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FeCl_3溶液中影响Cu蚀刻速度的因素 被引量:11
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作者 蔡坚 马莒生 +1 位作者 汪刚强 唐祥云 《中国有色金属学报》 EI CAS CSCD 北大核心 1998年第A01期61-65,共5页
采用喷蚀的方法,研究了Cu在2.5mol/LFeCl3溶液中影响蚀刻速度的几个因素。用XRD方法分析了Cu蚀刻表面的成分,证实了蚀刻过程中CuCl钝化膜的形成;研究了蚀刻速度随蚀刻时间的变化规律,给出了初步的解释;同... 采用喷蚀的方法,研究了Cu在2.5mol/LFeCl3溶液中影响蚀刻速度的几个因素。用XRD方法分析了Cu蚀刻表面的成分,证实了蚀刻过程中CuCl钝化膜的形成;研究了蚀刻速度随蚀刻时间的变化规律,给出了初步的解释;同时研究了蚀刻液中不同氯化物添加剂对蚀刻速度的影响,结果表明阴离子不是影响蚀刻速度的唯一因素,不能排除阳离子的影响;同时对蚀刻液的溶铜能力及失效蚀刻液的再生进行了初步的研究。 展开更多
关键词 刻速度 钝化膜 喷蚀 三氯化铁 引线框架
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新型SiC复合陶瓷的耐冲蚀性能 被引量:8
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作者 刘阳 刘荣华 +1 位作者 李曙 侯思焓 《材料研究学报》 EI CAS CSCD 北大核心 2006年第6期657-665,共9页
研究了新型SiC复合陶瓷的冲蚀行为,并与45碳钢、铸钢和Al_2O_3陶瓷进行了比较.结果表明:45碳钢、铸钢和冲蚀率大都在0.13~0.26 mg/g范围内随着攻角变化,最大值分别出现在15°、30°、90°攻角,具有典型韧、脆性材料的... 研究了新型SiC复合陶瓷的冲蚀行为,并与45碳钢、铸钢和Al_2O_3陶瓷进行了比较.结果表明:45碳钢、铸钢和冲蚀率大都在0.13~0.26 mg/g范围内随着攻角变化,最大值分别出现在15°、30°、90°攻角,具有典型韧、脆性材料的特点;新型SiC复合陶瓷的抗冲蚀性能优越,特别是其冲蚀率几乎不随攻角变化(冲蚀率大约为0.025 mg/g,速度影响因子为1.3~1.8).新型SiC复合陶瓷中软硬相的有效配合、凹凸不平的损伤表面、多粒度的多晶型SiC紧密结合和细小SiC颗粒的弥散强化对其优异抗冲蚀性能均起着重要的作用. 展开更多
关键词 无机非金属材料 新型SiC复合陶瓷 砂型冲
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Corrosion resistance of Fe-based amorphous metallic matrix coating fabricated by HVOF thermal spraying 被引量:19
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作者 王善林 成京昌 +1 位作者 李承勋 柯黎明 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第1期146-151,共6页
The Fe-based amorphous metallic matrix coating (Fe-AMMC) was fabricated with the powder mixtures of Fe-based metallic glass synthesized with industrial raw materials, NiCr alloy and WC particle by high velocity oxy-... The Fe-based amorphous metallic matrix coating (Fe-AMMC) was fabricated with the powder mixtures of Fe-based metallic glass synthesized with industrial raw materials, NiCr alloy and WC particle by high velocity oxy-fuel (HVOF) spraying. The corrosion resistance of Fe-AMMC was investigated by potentiodynamic polarization tests in 1 mol/L HCl, NaCl, H2SO4 and NaOH solutions, respectively. The surface morphologies corroded were observed by SEM. The results indicate that Fe-AMMC exhibits excellent corrosion resistance, higher corrosion resistance than 304L stainless steel in the chloride solutions. The low corrosion current density and passive current density of Fe-AMMC with a wide spontaneous passivation region are about 132.0μA/cm2 and 9.0 mA/cm2 in HCl solution, and about 2.5 μA/cm2 and 2.3 mA/cm2 in NaCl solution. The excellent corrosion resistance demonstrates that Fe-based amorphous metallic matrix powder is a viable engineering material in practical anti-corrosion and anti-wear coating applications. 展开更多
关键词 Fe-based metallic glass COATING corrosion resistance HVOF spraying
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Reactive HVOF sprayed TiN-matrix composite coating and its corrosion and wear resistance properties 被引量:7
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作者 马静 闫冬青 +2 位作者 胡建文 张欣 李扬 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第4期1011-1018,共8页
TiN-matrix composite coating was prepared on 45# steel by reactive high-velocity oxy-fuel (HVOF) spraying. Its microstructure, phase composition, micro-hardness, corrosion resistance in 3.5% NaC1 solution and wear r... TiN-matrix composite coating was prepared on 45# steel by reactive high-velocity oxy-fuel (HVOF) spraying. Its microstructure, phase composition, micro-hardness, corrosion resistance in 3.5% NaC1 solution and wear resistance were analyzed. The results suggest that the TiN-matrix composite coating is well bonded with the substrate. The micro-hardness measured decreases with the increase of applied test loads. And the micro-hardness of the coating under heavy loads is relatively high. The TiN-matrix composite coating exhibits an excellent corrosion resistance in 3.5% NaC1 solution. The corrosion potential of coating is positive and the passivation zone is broad, which indicates that the TiN-matrix composite coating is stable in the electrolyte and provides excellent protection to the substrate. The wear coefficient of the coating under all loads maintains at 0.49-0.50. The wear mechanism of the coating is revealed to be three-body abrasive wear. Yet the failure forms of TiN-matrix composite coating under different loads have an obvious difference. The failure form of coating under light loads is particle spallation due to the stress concentration while that of coating under heavy loads is crackin~ between inter-lamellae. 展开更多
关键词 reactive HVOF spraying TiN-matrix composite coating corrosion resistance wear resistance
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Fabrication, tribological and corrosion behaviors of detonation gun sprayed Fe-based metallic glass coating 被引量:7
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作者 吴宏 兰小东 +5 位作者 刘咏 李飞 张卫东 陈紫瑾 宰雄飞 曾晗 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第6期1629-1637,共9页
A metallic glass coating with the composition of Fe51.33Cr14.9Mo25.67Y3.4C3.44B1.26 (mole fraction, %) on the Q235 stainless steel was developed by the detonation gun (D-gun) spraying process. The microstructure a... A metallic glass coating with the composition of Fe51.33Cr14.9Mo25.67Y3.4C3.44B1.26 (mole fraction, %) on the Q235 stainless steel was developed by the detonation gun (D-gun) spraying process. The microstructure and the phase aggregate were analyzed by scanning electron microscopy and X-ray diffractometry, respectively. Microhardness, wear resistance and corrosion behavior were assessed using a Vickers microhardness tester, a ball-on-disk wear testing machine and the electrochemical measurement method, respectively. Microstructural studies show that the coatings possess a densely layered structure with the porosity less than 2.1%. The tribological behavior of the coatings examined under dry conditions shows that their relative wear resistance is five times higher than that of the substrate material. Both adhesive wear and abrasive wear contribute to the friction, but the former is the dominant wear mechanism of the metallic glass coatings. The coatings exhibit low passive current density and extremely wide passive region in 3.5% NaCl solution, thus indicating excellent corrosion resistance. 展开更多
关键词 Fe-based metallic glass coating detonation gun spraying microstructure tribological behavior corrosion behavior
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Effect of TiO_2 content on properties of Al_2O_3 thermal barrier coatings by plasma spraying 被引量:14
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作者 贾胜凯 邹勇 +2 位作者 徐计元 王静 余蕾 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第1期175-183,共9页
Al2O3 thermal barrier coatings with different TiO2 contents were deposited on 6061 aluminum alloy by plasma spraying. The corrosion resistance, thermal insulation property and phase composition of these coatings were ... Al2O3 thermal barrier coatings with different TiO2 contents were deposited on 6061 aluminum alloy by plasma spraying. The corrosion resistance, thermal insulation property and phase composition of these coatings were investigated. The results indicate that all the feedstock powders exhibit phase transformation during the spray process. With the increase of the TiO2 content in the powder, the corrosion resistance of the coating is enhanced but the thermal insulation property is decreased. This can be attributed to the higher thermal conductivity but lower melting point and brittleness of TiO2 than those of Al2O3, so it is easy for TiO2 to disperse in the brittle Al2O3 substrate during spraying, in which these dispersively distributed TiO2 play the role of hole sealing, releasing stress and reducing cracks. 展开更多
关键词 plasma spray corrosion resistance thermal insulation property phase transformation TiO2
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Influence of oxides on high velocity arc sprayed Fe-Al/Cr_3C_2 composite coatings 被引量:6
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作者 徐滨士 张伟 徐维普 《Journal of Central South University of Technology》 2005年第3期259-262,共4页
Fe-Al/Cr3C2 coatings were sprayed on low steel by high velocity arc spraying(HVAS) technology. The influences of oxides on erosion, corrosion and wear behavior for high velocity arc sprayed Fe-Al/Cr3C2 coatings were... Fe-Al/Cr3C2 coatings were sprayed on low steel by high velocity arc spraying(HVAS) technology. The influences of oxides on erosion, corrosion and wear behavior for high velocity arc sprayed Fe-Al/Cr3C2 coatings were studied. The results show that HVAS-sprayed Fe-Al/Cr3C2 coatings have good erosion, heat corrosion and wear resistance. The erosion resistance improves with the increase of the temperature. On one hand, the ferrous oxides are incompact, so they peel off the surface of the coatings easily during the high temperature erosion. On the other hand, compact Al2O3 films on the surface can protect the coatings. 展开更多
关键词 OXIDES Fe-Al/Cr_3C_2 coating arc sprayed corrosion resistance wear property
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Comparative study on corrosion behavior of plasma sprayed Al_2O_3, ZrO_2, Al_2O_3/ZrO_2 and ZrO_2/Al_2O_3 coatings 被引量:2
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作者 S.SATHISH M.GEETHA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第5期1336-1344,共9页
ZrO2, Al2O3, ZrO2/Al2O3 and Al2O3/ZrO2 coatings were fabricated on low carbon steel using atmospheric plasma spraying technique. The microstructure and phase composition of the as-sprayed coatings were examined by sca... ZrO2, Al2O3, ZrO2/Al2O3 and Al2O3/ZrO2 coatings were fabricated on low carbon steel using atmospheric plasma spraying technique. The microstructure and phase composition of the as-sprayed coatings were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The polarization test, salt spray test and immersion test were used to investigate the corrosion behavior of the coatings in 3.5% NaCl solution. The results suggested that the bilayered Al2O3/ZrO2 coating exhibits superior corrosion resistance when compared with the other coatings. This is ascribed to the presence of very few interconnected pores and stable phases in the coating. 展开更多
关键词 bilayered coating AL2O3 ZRO2 atmospheric plasma spraying corrosion
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Effects of F-Si sealer on electrochemical characteristics of 15%Al-85%Zn alloy thermal spray coating 被引量:2
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作者 Seong-Jong KIM Seung-Jun LEE 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第12期2798-2804,共7页
Most hulls of the ships are protected with paintings, sacrificial anode, and impressed current cathodic protection methods against corrosion problems. However, these conventional methods are not very effective because... Most hulls of the ships are protected with paintings, sacrificial anode, and impressed current cathodic protection methods against corrosion problems. However, these conventional methods are not very effective because the rudder of ships stern are exposed to very severe corrosive environment such as tides, speeds of ships, cavitations and erosion corrosion. The environmental factors such as cavitation and corrosion will cause damage for materials with the shock wave by the creation and destruction of bubble. To solve these problems, the cavitation and electrochemical experiments are executed for thermal spray coating with Al-Zn alloy wire material. Thereafter, and sealed specimens with F-Si sealer on Al-Zn alloy coated specimen are executed to improve electrochemical and anti-cavitation characteristics in sea water. The application of fluorine silicon sealing after spray coating of 15%Al-85%Zn seems to be appropriate not only in static environment but also in dynamic environment. 展开更多
关键词 CAVITATION Al-Zn alloy wire material thermal spray coating CORROSION
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Effect of Al content on high temperature erosion properties of arc-sprayed FeMnCrAl/Cr_3C_2 coatings 被引量:3
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作者 罗来马 刘少光 +2 位作者 俞佳 罗娟 郦剑 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第2期201-206,共6页
Three types of FeMnCrAl/Cr3C2 coatings with different AI content were deposited on 20# steel substrates by the high velocity arc spraying (HVAS) process. Surface microstructures of the coatings were analyzed by opti... Three types of FeMnCrAl/Cr3C2 coatings with different AI content were deposited on 20# steel substrates by the high velocity arc spraying (HVAS) process. Surface microstructures of the coatings were analyzed by optical microscopy (OM) and X-ray diffractometry (XRD). High temperature erosion (HTE) tests were performed in an erosion tester at different impact angles. The surface morphologies of the eroded coatings were observed on a field emission scanning electron microscope(FE-SEM). The laminated structure is found on all the prepared coatings with the porosity and oxide fraction in the coatings decreasing with the Al content from 0 to 15% (mass fraction). Sample FA3 with 15% Al, possessing the lowest porosity and oxide fraction, has the best HTE resistance, which demonstrates that Al addition can improve the HTE resistance of the coatings. The erosion rate of sample FA1 exhibits a maximum value at 90° impact angle. The maximum erosion rates of both FA2 and FA3 samples appear in the range of 60°-90° impact angles. Erosion loss of the coatings occurs through brittle breaking, cutting and fatigue spalling. 展开更多
关键词 high velocity arc spraying (HVAS) COATING erosion mechanism high temperature erosion(HTE)
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Improving Suction Performance of Centrifugal Pumps by Using Jetting Device 被引量:4
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作者 崔宝玲 朱祖超 +2 位作者 张剑慈 吴昱 陈鹰 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2004年第5期628-632,共5页
Improving the suction performance of centrifugal pumps by using jetting device is presented. The theoretical analysis, experimental study and engineering implementation show that suction performance of centrifugal pum... Improving the suction performance of centrifugal pumps by using jetting device is presented. The theoretical analysis, experimental study and engineering implementation show that suction performance of centrifugal pump can be improved with jetting device and be used for delivering the liquid media requiring high suction performance, whereas the efficiency and head of the pump will decrease a little. The effect of feed-back jetting on suction performance is the most obvious at design point. The suitable rate of feed-back flow is 2%-5%. 展开更多
关键词 centrifugal pump INDUCER suction performance jetting device
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Cavitation and electrochemical characteristics of thermal spray coating with sealing material 被引量:2
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作者 Seong-Jong KIM Seung-Jun LEE +3 位作者 In-Ju KIM Seong-Kweon KIM Min-Su HAN Seok-Ki JANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第4期1002-1010,共9页
Steel applied in ocean environment is exposed to corrosion and cavitation and is subject to increasing damages. To prevent this, anti-corrosion thermal spray coating technique is widely used. The low-temperature therm... Steel applied in ocean environment is exposed to corrosion and cavitation and is subject to increasing damages. To prevent this, anti-corrosion thermal spray coating technique is widely used. The low-temperature thermal spray coating was performed with 85%Al-14.5%Zn-0.5%Zr for ship materials and various sealing materials were applied to improve its durability, and the electrochemical behavior and cavitation characteristics were observed. The results show that the sealing improves all the properties of the materials. Hybrid ceramic and fluoro-silicon sealing materials show good electrochemical characteristics, and the fluoro-silieon sealing material shows the best anti-cavitation characteristics. 展开更多
关键词 thermal spray coating sealing material CAVITATION electrochemical characteristics
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Spray deposition of FeCrNiMn and high carbon steel coatings by thermite reaction 被引量:4
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作者 CHEN Gang SHEN Shu-cheng +1 位作者 NI Song ZHOU Chen-shang 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第12期2962-2970,共9页
A novel surface cladding technique was developed to prepare the FeCrNiMn alloy and high carbon steel cladding layers,and the microhardness,bonding strength,abrasion wear and corrosion resistance were investigated.The ... A novel surface cladding technique was developed to prepare the FeCrNiMn alloy and high carbon steel cladding layers,and the microhardness,bonding strength,abrasion wear and corrosion resistance were investigated.The microstructures of the cladding layers were analyzed by using X-ray diffraction(XRD),scanning electron microscopy(SEM),and energy dispersive spectrometry(EDS).The results show that the bonding strength between the substrate and the two cladding layers were(432.6±21)and(438.3±12)MPa,respectively.Vickers hardness values of the two cladding layers were HV418.5and HV329.6,respectively.The corrosion current densities of the two coatings were2.926×10–6and6.858×10–6A/cm2after electrochemical corrosion test in3.5%NaCl solution,and the wear rate were1.78×10–7and1.46×10–6mm3/mN after sliding wear test,respectively.This indicates that a well metallurgical bonding between the coating and the substrate was achieved,the abrasion wear and corrosion resistance of both coatings had been greatly improved compared with the substrate.The novel cladding technology is promising for preparing wear-and-corrosion resistant coatings. 展开更多
关键词 spray deposition thermite reaction COATING corrosion property wear property
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Improvement of surface corrosion resistance for magnesium alloy by combining thermal spray and cast-infiltration 被引量:2
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作者 张忠礼 丁勇 +3 位作者 王鑫 杨国强 沈威威 韩海玲 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第6期992-996,共5页
The present work focuses on a new method combining cast-infiltration with thermal spraying technology to improve the surface corrosion resistance of magnesium alloy.A zinc-based alloy layer was fabricated on the surfa... The present work focuses on a new method combining cast-infiltration with thermal spraying technology to improve the surface corrosion resistance of magnesium alloy.A zinc-based alloy layer was fabricated on the surface of AZ91D magnesium alloy. The microstructure of the layer was characterized by scanning electron microscopy equipped with an energy dispersive X-ray spectroscopy(EDS).The phase constituent of these alloys was identified by X-ray diffractometry(XRD).The analysis results reveal that a zinc-based alloy layer with a thickness of 700μm can form on the surface of AZ91 alloy matrix.The layer is composed of Mg7Zn3,MgZn and a small amount of α-Mg solid solution.The results indicate that the corrosion-resistance of the specimen with a zinc-based alloy layer is much better than that of the specimen without the layer after being immersed in 5%NaCl solution for 240 h, and the layer is more protective for the AZ91 alloy. 展开更多
关键词 arc spraying cast-infiltration magnesium alloy corrosion resistance
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Steady-state coupled analysis of flowfields and thermochemical erosion of C/C nozzles in hybrid rocket motors 被引量:2
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作者 ZHAO Sheng TIAN Hui +2 位作者 WANG PengFei YU NanJia CAI GuoBiao 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2015年第3期574-586,共13页
A hybrid rocket can be used in various applications and is an attractive propulsion system. However, serious erosion of nozzles is common in motor firing operations, which could restrict the application of hybrid rock... A hybrid rocket can be used in various applications and is an attractive propulsion system. However, serious erosion of nozzles is common in motor firing operations, which could restrict the application of hybrid rocket motors. Usually, the serious erosion is attributed to the high concentration of oxidizing species in hybrid motors, while the details of flowfields in the motors are not paid special attention to. In this paper, first the thermochemical erosion of C/C nozzle is simulated coupled with the flowfields in a 98% H2O2/hydroxyl-terminated polybutadiene(HTPB) hybrid rocket motor. The simulation is made on a typical axisymmetric motor, including a pre-combustion chamber, an aft-combustion chamber and nozzle structures. Thermochemica reactions of H2 O, CO2, OH, O and O2 with C are taken into account. Second, the change of flowfields due to fuel regression during motor firing operations is considered. Nozzle erosion in different flowfields is evaluated. Third, the results of nozzle erosion in the coupled simulation are compared with those under uniform and chemical equilibrium flow and motor firing test results. The results of simulation and firing tests indicate that the thermochemical erosion of nozzles in hybrid motors should be calculated coupled with flowfields in the motor. In uniform and chemical equilibrium flowfields, the erosion rate is overestimated. The diffusion flame in hybrid motors protects the nozzle surface from the injected oxidizer and high temperature products in flowfields, leading to a relatively fuel-rich environment above the nozzle. The influence of OH and the geometry of motor should also be considered in the evaluation of nozzle erosion in hybrid motors. 展开更多
关键词 hybrid rocket motor C/C nozzle thermochemical erosion
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