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Microstructure,interfacial reaction behavior,and mechanical properties of Ti_(3)AlC_(2)reinforced Al6061 composites
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作者 Zhi-bin LIU Jia-bao BAO +1 位作者 Wen-jie HU Hong YAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第9期2756-2771,共16页
The interfacial reaction behavior of Al and Ti_(3)AlC_(2)at different pouring temperatures and its effect on the microstructure and mechanical properties of the composites were investigated.The results show that the a... The interfacial reaction behavior of Al and Ti_(3)AlC_(2)at different pouring temperatures and its effect on the microstructure and mechanical properties of the composites were investigated.The results show that the addition of3.0 wt.%Ti_(3)AlC_(2)refines the average grain size ofα(Al)in the composite by 50.1%compared to Al6061 alloy.Morphological analyses indicate that an in-situ Al_(3Ti)transition layer of-180 nm in thickness is generated around the edge of Ti_(3)AlC_(2)at 720℃,forming a well-bonded Al-Al_(3Ti)interface.At this processing temperature,the ultimate tensile strength of A16061-3.0 wt.%Ti_(3)AlC_(2)composite is 199.2 MPa,an improvement of 41.5%over the Al6061 matrix.Mechanism analyses further elucidate that 720℃is favourable for forming the nano-sized transition layer at the Ti_(3)AlC_(2)edges.And,the thermal mismatch strengthening plays a dominant role in this state,with a strengthening contribution of about 74.8%. 展开更多
关键词 al6061 composites Ti_(3)alC_(2) MICROSTRUCTURE interfacial reaction tensile mechanical properties
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Effect of porosity and interface structures on thermal and mechanical properties of SiC_p/6061Al composites with high volume fraction of SiC 被引量:13
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作者 Yu HONG Wu-jie WANG +2 位作者 Jia-qin LIU Wen-ming TANG Yu-cheng WU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第5期941-949,共9页
50 vol.% SiCp/Al composites with high thermal and mechanical properties were successfully produced by spark plasma sintering technique. The influences of sintering temperature on the thermal conductivity, coefficient ... 50 vol.% SiCp/Al composites with high thermal and mechanical properties were successfully produced by spark plasma sintering technique. The influences of sintering temperature on the thermal conductivity, coefficient of thermal expansion and bending strength of the SiCp/Al composites were carefully investigated. The results show that the SiCp/Al composites sintered at 520℃ exhibits a thermal conductivity of 189 W/(m·K), a coefficient of thermal expansion (50.200℃) of 10.03×10^-6 K^-1 and a bending strength of 649 MPa. The high thermal and mechanical properties can be ascribed to the nearly full density and the well interfacial bonding between the alloy matrix and the SiC particles. This work provides a promising pathway for producing materials to meet the needs of high performance electronic packaging. 展开更多
关键词 spark plasma sintering sicp/6061al composites thermal properties mechanical properties
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Role of particle stimulated nucleation in recrystallization of hot extruded Al 6061/SiC_p composites 被引量:5
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作者 C.S.RAMESH R.KESHAVAMURTHY +1 位作者 Praveennath G.KOPPAD K.T.KASHYAP 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第1期53-58,共6页
Studies on texture and microstructure evolution in hot extruded Al 6061 aluminium alloy reinforced with uncoated and nickel coated SiC p were carried out by electron backscattered diffraction technique.Textures of bot... Studies on texture and microstructure evolution in hot extruded Al 6061 aluminium alloy reinforced with uncoated and nickel coated SiC p were carried out by electron backscattered diffraction technique.Textures of both the alloy and its composite with nickel coated SiC p do exhibit strong β fiber with its axis parallel to the direction of extrusion.In addition to the dominant cube texture(001) 100,fully recrystallized grains with partially equiaxed structure have been observed in the alloy reinforced with uncoated SiC p.The recrystallization texture of this composite can be attributed to the particle stimulated nucleation(PSN) due to the presence of SiC p with size less than 5 μm.Under these conditions,the low value of Zener-Hollomon,Z(~1012s-1) confirms that PSN is one of the dominant mechanisms for recrystallization and is governed by formation of deformation zone rather than stored energy. 展开更多
关键词 metal matrix composites 6061/sic p composite EXTRUSION particle stimulated nucleation RECRYSTalLIZATION stored energy
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Thermal analysis for brake disks of SiC/6061 Al alloy co-continuous composite for CRH3 during emergency braking considering airflow cooling 被引量:13
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作者 姜澜 姜艳丽 +2 位作者 喻亮 苏楠 丁友东 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第11期2783-2791,共9页
The mass of high-speed trains can be reduced using the brake disk prepared with SiC network ceramic frame reinforced 6061 aluminum alloy composite (SiCn/Al). The thermal and stress analyses of SiCn/Al brake disk dur... The mass of high-speed trains can be reduced using the brake disk prepared with SiC network ceramic frame reinforced 6061 aluminum alloy composite (SiCn/Al). The thermal and stress analyses of SiCn/Al brake disk during emergency braking at a speed of 300 km/h considering airflow cooling were investigated using finite element (FE) and computational fluid dynamics (CFD) methods. All three modes of heat transfer (conduction, convection and radiation) were analyzed along with the design features of the brake assembly and their interfaces. The results suggested that the higher convection coefficients achieved with airflow cooling will not only reduce the maximum temperature in the braking but also reduce the thermal gradients, since heat will be removed faster from hotter parts of the disk. Airflow cooling should be effective to reduce the risk of hot spot formation and disc thermal distortion. The highest temperature after emergency braking was 461 °C and 359 °C without and with considering airflow cooling, respectively. The equivalent stress could reach 269 MPa and 164 MPa without and with considering airflow cooling, respectively. However, the maximum surface stress may exceed the material yield strength during an emergency braking, which may cause a plastic damage accumulation in a brake disk without cooling. The simulation results are consistent with the experimental results well. 展开更多
关键词 finite element method brake disk co-continuous sic/6061 composite thermal analysis airflow cool
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Microstructure and thermophysical properties of SiC/Al composites mixed with diamond 被引量:6
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作者 郭宏 韩媛媛 +2 位作者 张习敏 贾成厂 徐骏 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第1期170-174,共5页
The thermophysical properties of the SiC /Al composites mixed with diamond(SiC-Dia/Al) were studied through theoretical calculation and experiments. The thermal conductivity and the thermal expansion coefficient of ... The thermophysical properties of the SiC /Al composites mixed with diamond(SiC-Dia/Al) were studied through theoretical calculation and experiments. The thermal conductivity and the thermal expansion coefficient of the SiC-Dia/Al were calculated by differential effective medium(DEM) theoretical model and extended Turner model, respectively. The microstructure of the SiC-Dia/Al shows that the combination between SiC particles and Al is close, while that between diamond particles and Al is not close. The experimental results of the thermophysical properties of the SiC-Dia/Al are consistent with the calculated ones. The calculation results show that when the volume ratio of the diamond particles to the SiC particles is 3:7, the thermal conductivity and the thermal expansion coefficient can be improved by 39% and 30% compared to SiC/Al composites, respectively. In other words, by adding a small amount of diamond particles, the thermophysical properties of the composites can be improved effectively, while the cost increases little. 展开更多
关键词 sic/al composites mixed with diamond thermal conductivity thermal expansion coefficient MICROSTRUCTURE
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Mixed rare earth metal conversion coatings on 2024 alloy and Al6061/SiC_p metal matrix composites
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作者 于兴文 曹楚南 《中国有色金属学会会刊:英文版》 CSCD 2000年第5期580-584,共5页
The processes of mixed rare earth metal (REM) conversion coatings on 2024 alloy and Al6061/SiC p metal matrix composites (MMC) were introduced. The coatings were examined to be honeycomb like feature by scanning elect... The processes of mixed rare earth metal (REM) conversion coatings on 2024 alloy and Al6061/SiC p metal matrix composites (MMC) were introduced. The coatings were examined to be honeycomb like feature by scanning electron microscope. X ray diffraction analysis revealed that the coatings are amorphous structure. The results of X ray photoelectron spectroscopy indicated that the mixed REM conversion coatings consist predominantly of Ce and O, the contents of other rare earth elements (such as La, Pr) are relatively low, the coatings are about 2~4 μm thickness with excellent adhesion and wearability. The results of mass loss test showed that the mixed REM conversion coatings produce corrosion resistant surface of 2024 alloy and Al6061/SiC p. [ 展开更多
关键词 alloy al6061/sic P METal matrix composites MIXED RARE earth METal CONVERSION coatings
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Microstructure and properties of Al/Si/SiC composites for electronic packaging 被引量:13
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作者 朱晓敏 于家康 王新宇 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第7期1686-1692,共7页
The Al/Si/SiC composites with medium volume fraction for electronic packaging were fabricated by gas pressure infiltration.On the premise of keeping the machinability of the composites,the silicon carbide particles,wh... The Al/Si/SiC composites with medium volume fraction for electronic packaging were fabricated by gas pressure infiltration.On the premise of keeping the machinability of the composites,the silicon carbide particles,which have the similar size with silicon particles(average 13 μm),were added to replace silicon particles of same volume fraction,and microstructure and properties of the composites were investigated.The results show that reinforcing particles are distributed uniformly and no apparent pores are observed in the composites.It is also observed that higher thermal conductivity(TC) and flexural strength will be obtained with the addition of SiC particles.Meanwhile,coefficient of thermal expansion(CTE) changes smaller than TC.Models for predicting thermal properties were also discussed.Equivalent effective conductivity(EEC) was proposed to make H-J model suitable for hybrid particles and multimodal particle size distribution. 展开更多
关键词 al/Si/sic composite electronic packaging thermal properties flexural strength
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Experimental study and numerical analysis on dry friction and wear performance of co-continuous SiC/Fe-40Cr against SiC/2618 Al alloy composites 被引量:1
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作者 姜澜 姜艳丽 +2 位作者 喻亮 苏楠 丁友东 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第12期2913-2924,共12页
The dry friction and wear behaviors of co-continuous composites SiC/Fe–40Cr against SiC/Al 2618 alloy were investigated on a ring-on-ring friction and wear tester at sliding speed of 30-105 m/s under the load of 1.0-... The dry friction and wear behaviors of co-continuous composites SiC/Fe–40Cr against SiC/Al 2618 alloy were investigated on a ring-on-ring friction and wear tester at sliding speed of 30-105 m/s under the load of 1.0-2.5 MPa. The experimental result reveals that the characteristic of two body abrasive wear and oxidation wear mechanisms are present for SiCn/2618 Al composite under higher load and sliding speed. SiC ceramic continuous network as the reinforcement can avoid composite from the third body wear that usually occurs in traditional particle reinforced composite. The mechanically mixed layer (MML) controls greatly the wear rate and friction coefficient of the composites. The composites tested at higher sliding speed exhibit higher value of friction coefficient and fluctuation, which is associated with the intermittent formation and removal of the MML. The wear and stress—strain behaviors of SiCn/Fe–40Cr against SiCn/Al 2168 at 30-105 m/s under 1.0-2.5 MPa were analyzed by finite element method with the software Solidwork2012 Simulation, respectively. The wear and stress–strain behavior of the composite predicted by the FEM correlated well with the experimental results. 展开更多
关键词 wear sic/al 2618 alloy sic/Fe-40Cr co-continuous composite finite element method
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冷喷涂Al6061/SiC复合涂层的制备及性能研究 被引量:1
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作者 邓碧欣 孙澄川 +1 位作者 何超 卢静 《材料保护》 CAS CSCD 2023年第11期1-12,76,共13页
为提高铝合金在实际应用过程中的服役寿命和可靠性,常需在表面制备涂层以提高其耐磨及耐腐蚀性能。采用不同种类的SiC粉末,利用冷喷涂工艺在Al7075合金基体表面制备了Al6061/SiC复合涂层,并探究了SiC含量和粒径对涂层微观组织、磨损性... 为提高铝合金在实际应用过程中的服役寿命和可靠性,常需在表面制备涂层以提高其耐磨及耐腐蚀性能。采用不同种类的SiC粉末,利用冷喷涂工艺在Al7075合金基体表面制备了Al6061/SiC复合涂层,并探究了SiC含量和粒径对涂层微观组织、磨损性能及耐腐蚀性能的影响。结果表明:添加不同种类SiC颗粒所制备的Al6061/SiC复合涂层均致密;相同SiC比例下,黑SiC所制备的涂层硬质颗粒含量最高,在10 N载荷下磨损率最低,但涂层的耐腐蚀性能相近;Al6061与黑SiC以不同质量比所制备的涂层中,涂层磨损率随着SiC比例的增加呈现先减小后增加的变化趋势,比例为3∶7的涂层硬质颗粒含量最高(57.5%),磨损率最低[1.7876×10^(-4)mm^(3)/(N·m)],但其耐腐蚀性能不如其余比例的涂层;将黑SiC筛分得到15~30μm和>30μm 2种粉末,将Al6061分别与这2种粉末按照3∶7质量比混合,所制备的涂层磨损性能均不如原始粉末,但耐腐蚀性能均优于原始粉末,其中混合15~30μm黑SiC所制备涂层的腐蚀电流密度为9.59×10^(-5)A/cm^(2)。 展开更多
关键词 冷喷涂 al6061/sic复合涂层 磨损性能 耐腐蚀性能 微观组织
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基于第一性原理的Si/SiC、Al/SiC界面成键特性和结合强度对比研究
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作者 肖鹏 胡启耀 邓昀麒 《原子与分子物理学报》 北大核心 2024年第5期159-168,共10页
采用半固态搅拌铸造法制备AlSi7-SiC复合材料,并利用真空压铸工艺实现了其近净成形,结合第一性原理计算方法研究了共晶Si对SiC颗粒和基体界面结合强度的影响.结果显示,在AlSi7-SiC复合材料中,发现较为严重的共晶Si偏析现象,当SiC颗粒同... 采用半固态搅拌铸造法制备AlSi7-SiC复合材料,并利用真空压铸工艺实现了其近净成形,结合第一性原理计算方法研究了共晶Si对SiC颗粒和基体界面结合强度的影响.结果显示,在AlSi7-SiC复合材料中,发现较为严重的共晶Si偏析现象,当SiC颗粒同时处于共晶Si和α-Al边界时,形成了少量的共晶Si夹杂、被大量共晶Si包裹、完全被共晶Si包裹三种典型的界面.第一性原理计算结果显示,在C端和Si端的Si/SiC界面中,弛豫后topSi 1配位方式具有最大的粘附功,与Al/SiC界面相比,Si/SiC界面具有更高的结合强度.Si偏析相提高了界面处的电荷密度,因而具有更好的界面结构稳定性. 展开更多
关键词 sic-al基复合材料 元素偏析 第一性原理 界面性能
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Microstructures and mechanical properties of 2024Al/Gr/SiC hybrid composites fabricated by vacuum hot pressing 被引量:3
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作者 胡程进 严红革 +1 位作者 陈吉华 苏斌 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第5期1259-1268,共10页
The 2024Al/Gr/SiC hybrid composite plates with 5%-10% SiC particles (volume fraction) and 3%-6% flaky graphite (Gr) (volume fraction) were fabricated by vacuum hot pressing and hot extrusion processing. The effe... The 2024Al/Gr/SiC hybrid composite plates with 5%-10% SiC particles (volume fraction) and 3%-6% flaky graphite (Gr) (volume fraction) were fabricated by vacuum hot pressing and hot extrusion processing. The effects of SiC and Gr on the microstructures and mechanical properties of the composites aged at 160, 175 and 190℃ were studied by optical microscopy, scanning electron microscopy (SEM), and hardness and tensile tests. The results indicate that the SiC particles have a more obvious effect on accelerating the aging response as compared with the Gr. Both the tensile strength and elongation are reduced by the Gr and SiC particles added into the matrix, while the Gr has a more negative influence on the elongation than the SiC particles. The tensile strength (ab), yield stress (as) and elongation (δ) of the 2024Al/3Gr/10SiC composite aged at 165℃ for 8 h are 387 MPa, 280.3 MPa and 5.7%, respectively. The hybrid composites are characterized by ductile fracture, which is associated with the ductile fracture of the matrix and the tearing of the interface between the matrix and the particles. 展开更多
关键词 2024al/Gr/sic composites vacuum hot pressing micros^tructure mechanical property heat treatment
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激光切割SiC/Al复合材料的温度场仿真分析
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作者 李廷余 吕国敏 王侃 《现代制造技术与装备》 2024年第9期86-88,104,共4页
SiC/Al复合材料具有较高的强度、较低的热膨胀系数和较好的耐腐蚀性,使其在多个高技术领域中具有很大的应用潜力和价值。然而,由于SiC/Al复合材料的高硬度特性,使用传统切削技术对其进行加工时,刀具磨损严重,影响加工效率。而激光切割... SiC/Al复合材料具有较高的强度、较低的热膨胀系数和较好的耐腐蚀性,使其在多个高技术领域中具有很大的应用潜力和价值。然而,由于SiC/Al复合材料的高硬度特性,使用传统切削技术对其进行加工时,刀具磨损严重,影响加工效率。而激光切割技术在SiC/Al复合材料加工方面具有显著优势。文章利用有限元分析软件对SiC/Al复合材料进行仿真分析,了解材料特性和激光切割去除机理,探究加热时间、光斑尺寸等对材料表面温度场的影响。 展开更多
关键词 sic/al复合材料 激光加工 温度场 有限元分析
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Development and Characterization of Aluminium-Based Metal Matrix Composites
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作者 M. A. Gafur Al Fahad Ahmed +1 位作者 Raisul Abrar Surya Sabrin Soshi 《Materials Sciences and Applications》 CAS 2023年第1期1-19,共19页
Aluminum based metal matrix composites were fabricated using stir casting where silicon carbide and alumina were the reinforcements. Different types of properties (physical-density, mechanical-tensile, hardness, chemi... Aluminum based metal matrix composites were fabricated using stir casting where silicon carbide and alumina were the reinforcements. Different types of properties (physical-density, mechanical-tensile, hardness, chemical-corrosion etc.) were measured and compared with base metals/alloys. The properties were significantly varied. The highest density was obtained for pure aluminium with 5% Al<sub>2</sub>O<sub>3</sub> whereas the lowest was obtained for AA-4032 alloy. The highest hardness was obtained for AA-4032 with 5% Al<sub>2</sub>O<sub>3</sub> whereas the lowest was obtained for pure Al with 5% Al<sub>2</sub>O<sub>3</sub>. The highest strength was obtained for AA-6061 with 5% coarse SiC whereas the lowest was obtained for pure Al. The highest impact strength was obtained for AA-4032 with 5% Al<sub>2</sub>O<sub>3</sub> whereas the lowest was obtained for AA-6061. The corrosion resistance of all composites was lower than that of the base materials. 展开更多
关键词 al AA-6061 AA-4032 sic al2O3 Stir-Casting Metal Matrix composite MMC NANOcomposites
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Particle Removal Mechanism of High Volume Fraction SiCp/Al Composites by Single Diamond Grit Tool 被引量:6
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作者 都金光 MING Wuyi +3 位作者 CAO Yang MA Jun 何文斌 LI Xiaoke 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2019年第2期324-331,共8页
Particle removal mechanism was presented during machining particle SiC/Al composites with diamond grinding tool. The relevant removal modes and their mechanisms were discussed considering the impact and squeezing effe... Particle removal mechanism was presented during machining particle SiC/Al composites with diamond grinding tool. The relevant removal modes and their mechanisms were discussed considering the impact and squeezing effect of diamond grit on the SiC particle. The experimental results show that the aluminum matrix has larger plastic deformation, so the aluminum mixed with the surplus SiC particles is cut from the surface. The SiC particles can be removed in multiple ways, such as broken/fractured, micro cracks, shearing and pulled out, etc. More particles removed by shearing, and less particles removed by fractured during material removal progress can produce a better machined surface. 展开更多
关键词 sicP/al composites sic particle removal MECHANISM GRINDING TOOL
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Relaxation of residual stresses in 20%SiC_w/6061Al composite as-extruded at high temperature 被引量:5
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作者 姜传海 吴建生 王德尊 《中国有色金属学会会刊:英文版》 CSCD 2001年第5期729-732,共4页
The residual stress in a 20%SiC w/6061Al composite as extruded was investigated by using X ray stress measurement method. It was found that, high residual stress existed in the composite and residual stress distributi... The residual stress in a 20%SiC w/6061Al composite as extruded was investigated by using X ray stress measurement method. It was found that, high residual stress existed in the composite and residual stress distribution in each direction are not uniform. Relaxation process of residual stress in the composite was dynamically measured during annealing at high temperature. It is verified that the relaxation of residual stress obeys the power law at high temperature. With the creep mechanism, the relaxation behavior of residual stresses at high temperature was analyzed. The results show that, the stress exponent and activation energy for stress relaxation of the composite are obviously higher than those of the matrix alloy. 展开更多
关键词 sic whisker al matrix composite residual stress stress relaxation X ray diffraction
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Comparison of effect of SiC and MoS2 on wear behavior of Al matrix composites 被引量:8
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作者 Mohammad ROUHI Mohammad MOAZAMI-GOUDARZI Mohammad ARDESTANI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第6期1169-1183,共15页
In order to improve dry sliding wear resistance of pure aluminum against steel, aluminum-based composites reinforced with different contents of SiC,MoS2 and SiC/MoS2 particles were synthesized by press and sintering o... In order to improve dry sliding wear resistance of pure aluminum against steel, aluminum-based composites reinforced with different contents of SiC,MoS2 and SiC/MoS2 particles were synthesized by press and sintering of the corresponding powder mixtures. The microstructural evaluations showed a dense microstructure which were in good agreement with the result of density and hardness measurements. The results of pin on disk wear tests performed against an AISI 52100 steel pin at a constant load and sliding velocity showed that there was a critical content for both types of the reinforcements at which the lowest wear rate was obtained, i.e. 10 vol.% and 2 vol.%, respectively,for Al/SiC and Al/MoS2 composites. However,the lowest wear rate and friction of coefficient were attained for Al/10 SiC/2 MoS2 hybrid composite. According to the scanning electron microscope observations, the predominant wear mechanism was changed from adhesion to abrasion mostly whenMoS2 particles were incorporated in the pure aluminum. Mild delamination was identified as the main wear mechanism for Al/SiC and Al/SiC/MoS2 composites. The frictional traces and worn surfaces of Al/SiC/MoS2 composites approached to those of Al/SiC composites,indicating the dominant role of SiC particles in tribological behavior of the hybrid composites. 展开更多
关键词 al/sic/MoS2 composites microstructure wear mechanism FRICTION
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Research on the Characters of the Cutting Force in Vibration Cutting Particle Reinforced Metal Matrix Composites SiC_p/Al 被引量:3
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作者 LIU Chuan-shao 1, ZHAO Bo 1,2, GAO Guo-fu 1, JIAO F eng 1 (1. Department of Mechanical Engineering, Jiaozuo Institute of Techno logy, Henan 454000, China 2. Institute of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期74-75,共2页
In this paper, turning experiments of machining particle reinforced metal matri x composites(PRMMCs) SiC p/Al with PCD tools have been carried out. The cutting force characteristics in ultrasonic vibration turning com... In this paper, turning experiments of machining particle reinforced metal matri x composites(PRMMCs) SiC p/Al with PCD tools have been carried out. The cutting force characteristics in ultrasonic vibration turning compared with that in com mon turning were studied. Through the single factor experiments and multiple fac tor orthogonal experiments, the influences of three kinds of cutting conditions such as cutting velocity, amount of feed and cutting depth on cutting force were analyzed in detail. Meanwhile, according to the experimental data, the empirica l formula of main cutting force in ultrasonic vibration turning was conclude d. According to the test results, the cutting force is direct proportion to cutt ing depth basically according to the relation between cutting force and other fa ctors, which is similar to that of common cutting, so is the feed rate, but the influence is not so big. The influence of cutting speed is larger than that of f eed rate on cutting force because the efficient cutting time increases in vibrat ion cycle with the increase of cutting speed, which causes cutting force to incr ease. The research results indicate: (1) Ultrasonic vibration turning possesses much lower main cutting force than that in common turning when adopting smaller cutting parameters. If using larger cutting parameters, the difference will inco nspicuous. (2) There are remarkable differences of cutting force-cutting veloci ty characteristics in ultrasonic vibration turning from that in common turning m ainly because built-up edge does not emerge in ultrasonic turning unlike common turning in corresponding velocity range. (3) In ultrasonic vibration cutting, t he influence of cutting velocity on cutting force is most obvious among thre e cutting parameters and the influence of feed is smallest. So adopting lower cu tting velocity and larger cutting depth not only can reduce cutting force effect ively but also can ensure cutting efficiency. (4) The conclusions are useful in precision and super precision manufacturing thin-wall pieces. 展开更多
关键词 composite sic p/al PCD tool ultrasonic vibrati on turning cutting force
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Effects of volume fraction of SiC particles on mechanical properties of SiC/Al composites 被引量:17
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作者 宋旼 《中国有色金属学会会刊:英文版》 CSCD 2009年第6期1400-1404,共5页
SiC particle reinforced pure aluminum composites were fabricated using a powder metallurgy method.The effect of the volume fraction of the SiC particles on the mechanical properties of the composites was studied by bo... SiC particle reinforced pure aluminum composites were fabricated using a powder metallurgy method.The effect of the volume fraction of the SiC particles on the mechanical properties of the composites was studied by both model simulation and experiment.The results indicate that the yield strength and tensile strength increase,but the elongation decreases with the increase in the volume fraction of the SiC particles.Both the modified shear lag model and the multi-scale model predicted yield strength and normalized elongation show similar evolution trends with the experimental data.However,the modified shear lag model underestimates the yield strength due to the ignorance of the strengthening mechanisms caused by grain refinement and dislocations interaction by the introduction of the SiC particles,and the multi-scale model overestimates the normalized elongation due to the ignorance of the pores distributed in the matrix. 展开更多
关键词 颗粒体积分数 sic粒子 复合材料 力学性能 碳化硅颗粒增强 多尺度模型 模型仿真 屈服强度
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Effect of SiC content on dry sliding wear, corrosion and corrosive wear of Al/SiC nanocomposites 被引量:3
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作者 Sareh MOSLEH-SHIRAZI Farshad AKHLAGHI Dong-yang LI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第7期1801-1808,共8页
The corrosion, corrosive wear and dry sliding wear of nanocomposites, are extremely complicated and involve various chemical, physical anbd mechanical factors. The aim of this work is to investigate the effects of nan... The corrosion, corrosive wear and dry sliding wear of nanocomposites, are extremely complicated and involve various chemical, physical anbd mechanical factors. The aim of this work is to investigate the effects of nanosized SiC content on the hardness, dry sliding wear, corrosion and corrosive wear of Al/SiC nanocomposites synthesized by mechanical milling cold pressing and hot extrusion. The corrosion resistance of these composites in 3%NaCl solution was investigated by electrochemical polarization testing and their dry sliding as well as corrosive wear resistance in the same solution was evaluated using a pin-on-disc tester. The microstructures of the samples and their worn surfaces were examined using scanning electron microscopy. It was shown that the dry sliding wear and corrosion resistance of these nanocomposites were improved with the increase of SiC content. It was concluded that due to the lubrication effect of the solution, both the friction coefficient and frictional heat that might soften the material were reduced. In addition, the improved strength of the nanocomposites combined with their better corrosion resistance contributed to their increased corrosive wear resistance, compared with the base alloy. The prominent wear mechanism in the unreinforced alloy was adhesive wear, in the Al/SiC nanocomposites, the wear mechanism changed to abrasive. 展开更多
关键词 al 6061 sic NANOcompositE mechanical milling CORROSION dry sliding wear corrosive wear
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Production and characterization of rich husk ash particulate reinforced AA6061 aluminum alloy composites by compocasting 被引量:2
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作者 J.ALLWYN KINGSLY GLADSTON N.MOHAMED SHERIFF +1 位作者 I.DINAHARAN J.DAVID RAJA SELVAM 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第3期683-691,共9页
Rice husk ash(RHA) is a potential particulate reinforcement to produce aluminum matrix composites(AMCs)economically.Compocasting method was applied to produce aluminum alloy AA6061 reinforced with various amounts(0,2%... Rice husk ash(RHA) is a potential particulate reinforcement to produce aluminum matrix composites(AMCs)economically.Compocasting method was applied to produce aluminum alloy AA6061 reinforced with various amounts(0,2%,4%,6%and 8%,mass fraction) of RHA particles.The prepared composites were characterized using X-ray diffraction and scanning electron microscopy.X-ray diffraction patterns of AA6061/RHA AMCs revealed the presence of RHA particles without the formation of any other intermetallic compounds.The scanning electron micrographs showed a homogeneous distribution of RHA particles all over the aluminum matrix.Intragranular distribution of RHA particles was observed.Further,RHA particles were bonded well with the aluminum matrix and a clear interface existed.The reinforcement of RHA particles enhanced the microhardness and ultimate tensile strength(UTS) of the AMCs.The tensile behavior is correlated to the microstructure of the AMCs. 展开更多
关键词 6061 al alloy aluminum matrix composite compocasting rice husk ash microstructure
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