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Wear Behavior of In-situ TiC Particles Reinforced Aluminum Matrix Composite 被引量:3
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作者 隋艳伟 CHEN Xiao +5 位作者 WANG Rui QI Jiqiu WEI Fuxiang HE Yezeng MENG Qingkun 孙智 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第3期552-556,共5页
The microstructure, tensile property and wear resistance of 7075 aluminum matrix composite reinforced with TiC particles prepared by in-situ reaction casting were investigated. The effect of TiC reinforcement on wear ... The microstructure, tensile property and wear resistance of 7075 aluminum matrix composite reinforced with TiC particles prepared by in-situ reaction casting were investigated. The effect of TiC reinforcement on wear behavior was analyzed. The wear mechanism was also discussed. A micro-mechanism model of reaction kinetics for synthesis of TiC was acquired. Results show that TiC could increase the tensile and yield strength, but decrease the elongation. Besides, TiC particles improve the property of wear resistance of 7075 aluminum alloy. The wear mechanisms include abrasive wear and adhesive wear in wear test process. 展开更多
关键词 in-situ reaction tic tensile properties wear behavior
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Microstructure of a Ni Matrix Composite Coating Reinforced by In-situ TiC Particles Using Plasma Cladding 被引量:1
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作者 WUYu-ping WANGZe-hua LINPing-hua 《材料热处理学报》 EI CAS CSCD 北大核心 2004年第05B期1041-1044,共4页
Plasma cladding process was used to prepare the TiC/Ni composite coating on the mild steel substrates. The TiC particles were synthesized in-situ. Microstructure and properties of the coating were investigated by opti... Plasma cladding process was used to prepare the TiC/Ni composite coating on the mild steel substrates. The TiC particles were synthesized in-situ. Microstructure and properties of the coating were investigated by optical microscopy, X-Ray diffraction, SEM, TEM and microhardness tester. The results show that the interface between the coating and the substrate is metallurgically bonded. The coating was uniform and almost defect-free when [Ti+C] varied from 10% to 20% after ball milling. The microstructure of the coating is mainly composed of -Ni dendrite, interdendritic eutectic ( -Ni austenite, M23C6 and CrB) and TiC particles. Most of the TiC particles are spherical and a small fraction is blocky in size of l^2(im. The TiC particles are smaller at the bottom than near the top of the coating. The coating has a gradient microstructure and a highest hardness of lOOOHyO. 1. 展开更多
关键词 显微结构 等离子包覆 复合涂层 tic颗粒
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Compressive response and microstructural evolution of in-situ TiB_(2)particle-reinforced 7075 aluminum matrix composite 被引量:12
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作者 Han WANG Hai-ming ZHANG +2 位作者 Zhen-shan CUI Zhe CHEN Dong CHEN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第5期1235-1248,共14页
The hot forming behavior,failure mechanism,and microstructure evolution of in-situ TiB_(2)particle-reinforced 7075 aluminum matrix composite were investigated by isothermal compression test under different deformation... The hot forming behavior,failure mechanism,and microstructure evolution of in-situ TiB_(2)particle-reinforced 7075 aluminum matrix composite were investigated by isothermal compression test under different deformation conditions of deformation temperatures of 300−450℃ and strain rates of 0.001^(−1)s^(−1).The results demonstrate that the failure behavior of the composite exhibits both particle fracture and interface debonding at low temperature and high strain rate,and dimple rupture of the matrix at high temperature and low strain rate.Full dynamic recrystallization,which improves the composite formability,occurs under conditions of high temperature(450℃)and low strain rate(0.001 s^(−1));the grain size of the matrix after hot compression was significantly smaller than that of traditional 7075Al and ex-situ particle reinforced 7075Al matrix composite.Based on the flow stress curves,a constitutive model describing the relationship of the flow stress,true strain,strain rate and temperature was proposed.Furthermore,the processing maps based on both the dynamic material modeling(DMM)and modified DMM(MDMM)were established to analyze flow instability domain of the composite and optimize hot forming processing parameters.The optimum processing domain was determined at temperatures of 425−450℃ and strain rates of 0.001−0.01 s^(−1),in which the fine grain microstructure can be gained and particle crack and interface debonding can be avoided. 展开更多
关键词 in-situ TiB2 particles aluminum matrix composite hot compression deformation particle fracture interface debonding dynamic recrystallization
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Microstructural evolution of copper-titanium alloy during in-situ formation of TiB_2 particles 被引量:2
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作者 M.SOBHANI H.ARABI +1 位作者 A.MIRHABIBI R.M.D.BRYDSON 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第10期2994-3001,共8页
Bulk Cu-Ti alloy reinforced by TiB2 nano particles was prepared using in-situ reaction between Cu 3.4%Ti and Cu-0.7%B master alloys along with rapid solidification and subsequent heat treatment for 1-10 h at 900 ℃. H... Bulk Cu-Ti alloy reinforced by TiB2 nano particles was prepared using in-situ reaction between Cu 3.4%Ti and Cu-0.7%B master alloys along with rapid solidification and subsequent heat treatment for 1-10 h at 900 ℃. High-resolution transmission electron microscopy (HRTEM) characterization showed that primary TiB2 nano particles and TiB whiskers were formed by in-situ reaction between Ti and B in the liquid copper. The formation of TiB whiskers within the melt led to coarsening of TiB2 particles. Primary TiB2 particles were dispersed along the grain boundaries and hindered grain growth at high temperature, while the secondary TiB2 particles were formed during heat treatment of the alloy by diffusion reaction of solute titanium and boron inside the grains. Electrical conductivity and hardness of the composite were evaluated during heat treatment. The results indicated that the formation of secondary TiB2 particles in the matrix caused a delay in hardness reduction at high temperature. The electrical conductivity and hardness increased up to 8 h of heat treatment and reached 33.5% IACS and HV 158, respectively. 展开更多
关键词 in-situ reaction TiB whiskers TiB2 particles Cu-Ti alloy composite
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Study on in-situ WC particles/tungsten wire reinforced iron matrix composites under electromagnetic field 被引量:2
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作者 Niu Libin Xu Yunhua Wu Hong 《China Foundry》 SCIE CAS 2010年第2期157-162,共6页
By applying electromagnetic field to a system consisting of tungsten wires and grey cast iron melt,the grey cast iron matrix composite reinforced by either in-situ WC particles or the combination ofin-situ WC particle... By applying electromagnetic field to a system consisting of tungsten wires and grey cast iron melt,the grey cast iron matrix composite reinforced by either in-situ WC particles or the combination ofin-situ WC particles and the residual tungsten wire was obtained.By means of differential thermal analysis(DTA),the pouring temperature ofiron melt was determined at 1,573 K.The microstructures of the composites were analyzed by using of X-ray diffraction(XRD),scanning electron microscopy(SEM) equipped with an energy dispersive spectrum(EDS) and pin-on-disc abrasive wear test.The obtained results indicated that,with the enhancing frequency of electromagnetic field,the amount ofin-situ WC particles gradually increases,leading to continuous decrease of the residual tungsten wires.When the electromagnetic field frequency was up to 4 kHz,tungsten wires reacted completely with carbon atoms in grey cast iron melt,forming WC particals.The electromagnetic field appeared to accelerate the elemental diffusion in the melt,to help relatively quick formation of a series of small FeW-C ternary zones and to improve the kinetic condition ofin-situ WC fabrication.As compared with the composite prepared without the electromagnetic field,the composite fabricated at 4 kHz presented good wear resistance. 展开更多
关键词 tungsten carbide particle COMPOSITE electromagnetic field in-situ synthesis grey cast iron
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Friction and wear properties of casting in-situ silicon particle reinforced ZA27 composites 被引量:1
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作者 Chen Tijun Yuan Chengren +3 位作者 Fu Mingfeng Ma Ying LiYuandong Hao Yuan 《China Foundry》 SCIE CAS 2009年第1期1-8,共8页
The effects of silicon particle content and testing temperature on friction and wear properties of casting in-situ silicon particle reinforced ZA27 composites were investigated.The wear mechanisms were mainly discusse... The effects of silicon particle content and testing temperature on friction and wear properties of casting in-situ silicon particle reinforced ZA27 composites were investigated.The wear mechanisms were mainly discussed by observations of both worn surfaces and their side views.The results indicated that the variations of wear resistance with increasing of silicon particle content,at all of the testing temperatures applied,showed a similar tendency with a manner of non-monotonous change.It was surprised that the wear resistance decreased with the increase of silicon particle content from 2 vol.%to 5 vol.%,while it increased when the content was less than 2 vol.%or more than 5 vol.%.Similarly,the friction coefficient also did not change monotonously.The dominative wear mechanism changed from a relatively severe regime of plastic deformation accompanied by adhesion wear to a mild regime of smear,then to a very severe regime of severe plastic deformation induced wear,and finally again to a relatively mild regime of smear accompanied by abrasive wear as the silicon content increased.The wear resistance always decreased with elevating testing temperature,but the decrease ranges were different for the composites with different silicon contents.The friction coefficients changed irregularly for the different composites with the increase of testing temperature.Correspondingly,the wear mechanism alternated from a mild regime of smear accompanied by abrasive wear to a severe regime of plastic deformation accompanied by adhesion wear. 展开更多
关键词 in-situ composite silicon particle friction and wear wear mechanism HARDNESS
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Effects of in-situ ZrB_2 particle on grain refinement of ZrB_2/AZ91D magnesium matrix composite 被引量:2
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作者 Wu Jiangjing Zhao Yutao +2 位作者 Zhang Songli Chen Gang Zhang Zhenya 《China Foundry》 SCIE CAS 2012年第1期28-33,共6页
In-situ ZrB2/AZ91D magnesium matrix composite was successfully synthesized with AI/K2ZrF6+NH4BF4 by means of Direct Melt Reaction. The fabricated ZrB2/AZ91D magnesium matrix composite through direct melt mixing metho... In-situ ZrB2/AZ91D magnesium matrix composite was successfully synthesized with AI/K2ZrF6+NH4BF4 by means of Direct Melt Reaction. The fabricated ZrB2/AZ91D magnesium matrix composite through direct melt mixing method was investigated. Results from X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS) confirmed the existence of ZrB2 particles in the AZ91D alloy, and most ZrB2 particles were in the size range of just several microns, some even to 100 nm. The cast specimens were studied through corrosion testing and heat treatment. The average grain size of AZ91D decreased markedly from about 250 pm to 50 IJm. In addition, the shape and size of the ,β-MglTAI12 phase as well as the morphologies of primary a-Mg in the magnesium matrix composite were greatly changed. The network structure of the β-MglTAI12 phase was broken into small blocks and the size of a-Mg decreased significantly. 展开更多
关键词 in-situ ZrB2 particles ZrB2/AZ91D composites β-MgITAl12 phase grain refinement
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PARTICLES ANALYSIS OF Al_2O_3 PARTICLE REINFORCED ZL202 MATRIX COMPOSITES PREPARED BY IN-SITU REACTION
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作者 X.H. Yan, S.C. Sun and Z.Y. JiangSchool of Materials Science and Engineering, Jiangsu University, Jiangsu 212013, China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2002年第6期531-537,共7页
ZL202 matrix composite reinforced by Al2O3 particles was prepared by combining in-situ reaction and casting techniques. Particles' size in the composites was from 1 to 5 microns in diameter. X-ray diffraction anal... ZL202 matrix composite reinforced by Al2O3 particles was prepared by combining in-situ reaction and casting techniques. Particles' size in the composites was from 1 to 5 microns in diameter. X-ray diffraction analysis verified that the reinforcing particleswere δ-Al2O3 which belong to γ-Al2O3 series. The wetting angle between matrix andreinforcement was less than 90°. Energy spectrum analysis indicated that the reactionin bell cover pressing process took place not so completely as in flouring stir process. When the reaction was finished, the matrix was still ZL202 alloy in both.processes. 展开更多
关键词 metal matrix composites in-situ reaction particleS
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Tribological properties and wear prediction model of TiC particles reinforced Ni-base alloy composite coatings 被引量:4
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作者 谭业发 何龙 +2 位作者 王小龙 洪翔 王伟刚 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第8期2566-2573,共8页
TiC particles reinforced Ni-based alloy composite coatings were prepared on 7005 aluminum alloy by plasma spray. The effects of load, speed and temperature on the tribological behavior and mechanisms of the composite ... TiC particles reinforced Ni-based alloy composite coatings were prepared on 7005 aluminum alloy by plasma spray. The effects of load, speed and temperature on the tribological behavior and mechanisms of the composite coatings under dry friction were researched. The wear prediction model of the composite coatings was established based on the least square support vector machine (LS-SVM). The results show that the composite coatings exhibit smaller friction coefficients and wear losses than the Ni-based alloy coatings under different friction conditions. The predicting time of the LS-SVM model is only 12.93%of that of the BP-ANN model, and the predicting accuracies on friction coefficients and wear losses of the former are increased by 58.74%and 41.87%compared with the latter. The LS-SVM model can effectively predict the tribological behavior of the TiCP/Ni-base alloy composite coatings under dry friction. 展开更多
关键词 tic particles Ni-based alloy composite coating least square support vector machine(LS-SVM) wear prediction model
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TiC粒子尺寸对增强马氏体耐磨钢磨损性能的影响
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作者 杨建华 《宽厚板》 2024年第2期1-6,共6页
采用不同凝固速率获得相同成分的铸坯,按不同压缩比将铸坯热轧,经过热处理后,获得成分相同、硬度在450HV左右、TiC粒子尺寸在1.88~3.20μm之间的TiC粒子增强马氏体耐磨钢。对比研究TiC粒子增强马氏体耐磨钢在不同载荷往复滑动磨损条件... 采用不同凝固速率获得相同成分的铸坯,按不同压缩比将铸坯热轧,经过热处理后,获得成分相同、硬度在450HV左右、TiC粒子尺寸在1.88~3.20μm之间的TiC粒子增强马氏体耐磨钢。对比研究TiC粒子增强马氏体耐磨钢在不同载荷往复滑动磨损条件下的磨损行为,结果表明:随着磨损载荷的增加,最佳耐磨性TiC粒子尺寸从1.88μm增加至2.60μm,其磨损机理为磨料磨损、氧化磨损和分层剥落。 展开更多
关键词 tic粒子增强 马氏体耐磨钢 往复滑动磨损
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Laser induced TiC particle reinforced composite layer on Ti6Al4V and their microstructural characteristics 被引量:7
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作者 张松 吴维 +1 位作者 王茂才 董世运 《中国有色金属学会会刊:英文版》 CSCD 2000年第1期6-9,共4页
An in situ synthesized TiC particle reinforced composite layer on Ti6Al4V were fabricated by laser induced reaction of the pre placed mixed powders of Ti and Cr 3C 2. The microstructure of the composite layer was stro... An in situ synthesized TiC particle reinforced composite layer on Ti6Al4V were fabricated by laser induced reaction of the pre placed mixed powders of Ti and Cr 3C 2. The microstructure of the composite layer was strongly related to the composition of original powders and also the laser processing parameters. Under certain processing parameters, the matrix of the composite layer was transferred from dual α + β to single phase β with increasing Cr 3C 2 content in the original powder mixture. The TiC particles were fine and uniformly dispersed in the matrix. Furthermore, the fine TiC particles show excellent compatibility with the matrix, thus offering good wear performance. 展开更多
关键词 METALLIC composite tic particleS in SITU FORMING coatingDocument code: A
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The Synthesis of TiNi and Composite Particles in Molten Salts 被引量:2
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作者 Yang Ruisong Cui Lishan Zheng Yanjun 《Petroleum Science》 SCIE CAS CSCD 2005年第3期37-39,共3页
A novel process for synthesizing TiNi and TiNi/TiC particles, called the high-temperature salt-melting method, is discussed in this paper. So far as this method is concerned, the molten salts are a reaction medium tha... A novel process for synthesizing TiNi and TiNi/TiC particles, called the high-temperature salt-melting method, is discussed in this paper. So far as this method is concerned, the molten salts are a reaction medium that does not take part in the chemical reaction but can be easily dissolved by water washing. With this method, TiNi shape memory alloy and TiNi/TiC composite particles were prepared in molten salts at 680-850℃. TiNi particles, ranging from 100 nm to several microns in diameter, are obtained and the reverse martensitic transformation is confirmed in these particles by the differential scanning calorimetry (DSC). The reaction temperature and the holding time have no significant influence on the particle size, morphology or the reverse martensitic transformation characteristics. In the molten salts, the released heat of the chemical reaction causes the local temperature to rise quickly, which is the key to obtaining the desired particulate composite. 展开更多
关键词 tic particles TiNi particles molten salts martensitic transformation
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Friction behavior of Ti-30Fe composites strengthened by TiC particles 被引量:4
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作者 Sheng-hang XU Jing-wen QIU +3 位作者 Hui-bin ZHANG Hua-zhen CAO Guo-qu ZHENG Yong LIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第4期988-998,共11页
Ti-Fe-x TiC(x=0, 3, 6, 9, wt.%) composites were fabricated through low temperature ball milling of Ti, Fe and TiC powders, followed by spark plasma sintering. The results show that β-Ti, β-Ti-Fe, η-Ti4 Fe2 O0.4 and... Ti-Fe-x TiC(x=0, 3, 6, 9, wt.%) composites were fabricated through low temperature ball milling of Ti, Fe and TiC powders, followed by spark plasma sintering. The results show that β-Ti, β-Ti-Fe, η-Ti4 Fe2 O0.4 and TiC particles can be found in the composites. The microstructure can be obviously refined with increasing the content of TiC particles. The coefficient of friction(COF) decreases and the hardness increases with increasing the content of TiC particles. The adhesive wear is the dominant wear mechanism of all the Ti-Fe-x TiC composites. The Ti-Fe-6 TiC composite shows the best wear resistance, owing to the small size and high content of TiC particle as well as relatively fine microstructure. The wear rate of the Ti-Fe-6 TiC composite is as low as 1.869× 10-5 mm3/(N·m) and the COF is only 0.64. Therefore, TiC particle reinforced Ti-Fe based composites may be utilized as potential wear resistant materials. 展开更多
关键词 tic particle Ti-Fe based composite powder metallurgy MICROSTRUCTURE friction behavior
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Microstructure and wear properties of the electroslag remelting layer reinforced by TiC particles 被引量:2
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作者 Qianlin Wu Yangshan Sun Guoqing Li 《Journal of University of Science and Technology Beijing》 CSCD 2008年第6期769-774,共6页
The electroslag remelting (ESR) layer reinforced by TiC particles was obtained by electroslag remelting. The microstructure and wear properties of the ESR layer were studied by means of scanning electron microscopy ... The electroslag remelting (ESR) layer reinforced by TiC particles was obtained by electroslag remelting. The microstructure and wear properties of the ESR layer were studied by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), and wear test. The results indicate that TiC particles are synthesized by self-propagating high-temperature synthesis (SHS) reaction during the electroslag remelting process. The size of TiC particles is in the range of 1-10 μm, and the distribution of TiC particles is uniform, from outside to inside of the ESR layer, and the volume fraction and the size of TiC particles decrease gradually. Molten iron and slag flow into porosity due to the SHS process leading to rapid densification and the elimination of porosity in the ESR layer during the ESR process. TiC particles enhance the wear resistance of the ESR layer, whereas CaF2 can improve the high temperature lubricating property of the ESR layer. 展开更多
关键词 electroslag remelting (ESR) tic particles POROSITY wear resistance lubricating property
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Friction and wear behavior of TiC particle reinforced ZA43 matrix composites 被引量:2
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作者 谢贤清 张荻 +1 位作者 刘金水 吴人洁 《中国有色金属学会会刊:英文版》 CSCD 2001年第2期249-253,共5页
TiC/ZA43 composites were fabricated by XD TM and stirring casting techniques. The tribology properties of the unreinforced ZA43 alloy and the composites were studied by using a block on ring apparatus. Experimental re... TiC/ZA43 composites were fabricated by XD TM and stirring casting techniques. The tribology properties of the unreinforced ZA43 alloy and the composites were studied by using a block on ring apparatus. Experimental results show that the incorporation of TiC particles improves the microstructure of ZA43 matrix alloy. The coefficient of friction μ and the width of worn groove decrease with the increase of TiC volume fraction φ (TiC). The width of worn groove and μ of the composite during wear testing increase with increasing the applied load. Metallographic examinations reveal that unreinforced ZA43 alloy has deep ploughing grooves with obvious adhesion phenomenon, whereas TiC/ZA43 composites have smooth worn surface. Delamination formation is related to the fatigue cracks and the shear cracks on the surface. [ 展开更多
关键词 ZA43 alloy tic particle fine equiaxed grain friction and wear
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Fabrication of cast carbon steel with ultrafine TiC particles 被引量:2
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作者 Sang-Hoon LEE Jin-Ju PARK +3 位作者 Sung-Mo HONG Byoung-Sun HAN Min-Ku LEE Chang-Kyu RHEE 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第A01期54-57,共4页
The carbon steels dispersed with ultrafine TiC particles were fabricated by conventional casting method. The casting process is more economical than other available routes for metal matrix composite production, and th... The carbon steels dispersed with ultrafine TiC particles were fabricated by conventional casting method. The casting process is more economical than other available routes for metal matrix composite production, and the large sized components to be fabricated in short processing time. However, it is extremely difficult to obtain uniform dispersion of ultrafine ceramic particles in liquid metals due to the poor wettability and the specific gravity difference between the ceramic particle and metal matrix. In order to solve these problems, the mechanical milling (MM) and surface-active processes were introduced. As a result, Cu coated ultrafine TiC powders made by MM process using high energy ball milling machine were mixed with Sn powders as a surfactant to get better wettability by lowering the surface tension of carbon steel melt. The microstructural investigations by OM show that ultrafine TiC particles are distributed uniformly in carbon steel matrix. The grain sizes of the cast matrix with ultrafine TiC particles are much smaller than those without ultrafine TiC particles. This is probably due to the fact that TiC particles act as nucleation sites during solidification. The wear resistance of cast carbon steel composites added with MMed TiC/Cu-Sn powders is improved due to grain size refinement. 展开更多
关键词 tic particles mechanical milling carbon steel CASTING DISPERSION WETTABILITY
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Microstructure of Fe-Based Alloy Hardfacing Coating Reinforced by TiC-VC Particles 被引量:7
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作者 WANG Xin-hong ZOU Zeng-da QU Shi-yao 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2006年第4期51-55,共5页
Mierostrueture of the Fe-based alloy hardfaeing coating reinforced by TiC-VC particles was investigated by means of SEM, TEM, XRD and EPMA. The thermodynamics and effect of elements on the carbides were discussed. The... Mierostrueture of the Fe-based alloy hardfaeing coating reinforced by TiC-VC particles was investigated by means of SEM, TEM, XRD and EPMA. The thermodynamics and effect of elements on the carbides were discussed. The result shows that TiC-VC carbides can be formed during arc welding. Carbides with particle size of 2 ~4μm are uniformly dispersed in the matrix. Evidently the covering components and their amount affect the microstrueture and hardness of the coatings. An excellent microstructure and hardness of hardfacing coating were obtained, while the amount of graphite, FeTi and FeV was controlled within the range of 8%- 10%, 15%- 18% and 8%- 12%, respectively. 展开更多
关键词 tic-VC particle arc welding Fe-based hardfacing coating MICROSTRUCTURE
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Achieving novel copper-steel joints with a combination of high strength and ductility reinforced by in-situ Fe-rich particles
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作者 Wu-Qingliang Peng Qiang Li +2 位作者 Yu-Ping Xu Hai-Shan Zhou Guang-Nan Luo 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第15期231-245,共15页
Strength and ductility are typically mutually exclusive in traditional copper-steel joints.This work pro-poses a strategy to overcome the inherent trade-off between strength and ductility through high speed electron b... Strength and ductility are typically mutually exclusive in traditional copper-steel joints.This work pro-poses a strategy to overcome the inherent trade-off between strength and ductility through high speed electron beam welding with a preferred deflection to facilitate the in-situ formation of Fe-rich particles in the Cu matrix.The Fe-rich particles with an average diameter of 178.5 nm feature a 3D spatial network distribution across practically the entire joint.The obtained joint reinforced with such Fe-rich particles achieves ultimate high tensile strength(413 MPa)while maintaining excellent ductility(22%).The im-proved strength of the copper-steel joint is derived from the combined effects of dislocation strengthen-ing and grain refinement strengthening,while the increase in room-temperature ductility is mainly due to the high Schmid factor up to 0.454,which promotes the primary slip system to initiate easily during tensile deformation.This work provides a novel perspective on creating copper-steel joints in terms of achieving microstructural refinement and outstanding strength-ductility synergy. 展开更多
关键词 Copper-steel joints in-situ Fe-rich particles 3D spatial network-microstructure Electron beam welding
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终冷温度对稀土TiC颗粒增强耐磨钢组织和性能的影响
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作者 武会宾 丁超 袁晓鸣 《包钢科技》 2024年第4期72-78,共7页
稀土元素在钢铁材料中的应用对优化其性能具有重要意义。文章以稀土元素铈(Ce)作为主要添加剂,制备了一种稀土TiC颗粒增强的耐磨钢,并系统地探讨了终冷温度对其组织和耐磨性能的影响。微观组织分析表明,凝固过程中铈元素能够有效地细化... 稀土元素在钢铁材料中的应用对优化其性能具有重要意义。文章以稀土元素铈(Ce)作为主要添加剂,制备了一种稀土TiC颗粒增强的耐磨钢,并系统地探讨了终冷温度对其组织和耐磨性能的影响。微观组织分析表明,凝固过程中铈元素能够有效地细化铸态组织中的长条链状TiC颗粒,轧制过程中,残余奥氏体含量会随着终冷温度的降低有所减少。磨损试验表明,稀土铈微合金化的TiC颗粒能够有效阻碍磨损的进行,从而提高钢板的耐磨性能。 展开更多
关键词 稀土元素铈 耐磨钢 tic颗粒 终冷温度
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xTiC/LA123复合材料力学性能及显微组织研究
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作者 王开明 张扬 +1 位作者 康豪 张宁 《兵器材料科学与工程》 CAS CSCD 北大核心 2024年第6期36-39,共4页
强度不足是限制镁锂合金材料研究和应用的难题之一,复合化是提高金属材料强度的一条有效途径。本文采用搅拌铸造法制备了颗粒增强xTiC/LA123复合材料,并对其进行轧制变形。通过XRD、SEM和力学性能测试,研究TiC颗粒对铸态及轧制态xTiC/LA... 强度不足是限制镁锂合金材料研究和应用的难题之一,复合化是提高金属材料强度的一条有效途径。本文采用搅拌铸造法制备了颗粒增强xTiC/LA123复合材料,并对其进行轧制变形。通过XRD、SEM和力学性能测试,研究TiC颗粒对铸态及轧制态xTiC/LA123复合材料力学性能及显微组织的影响。结果表明:随着TiC含量的升高,铸态复合材料晶粒尺寸降低,强度先升后降,在TiC的质量分数为6%时强度最高,屈服强度及抗拉强度为152、156 MPa。轧制后TiC颗粒沿轧制方向呈流线状分布,且强度变化规律与铸态复合材料规律一致,随TiC含量升高先升后降,屈服强度及抗拉强度升至237、252 MPa,比铸态分别提高了43%和44%。 展开更多
关键词 镁锂基复合材料 tic颗粒 显微组织 力学性能
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