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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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Al 6061/SiC_p稀土转化膜的组成、结构及性能 被引量:6
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作者 于兴文 曹楚南 +3 位作者 林海潮 周育红 周德瑞 尹钟大 《物理化学学报》 SCIE CAS CSCD 北大核心 2000年第6期547-552,共6页
A double layer Rare Earth Metal (REM) conversion coating process of Al 6061/SiCp metal matrix composites (MMC) was studied.The corrosion resistance of REM conversion coating was examined by electrochemical impedance s... A double layer Rare Earth Metal (REM) conversion coating process of Al 6061/SiCp metal matrix composites (MMC) was studied.The corrosion resistance of REM conversion coating was examined by electrochemical impedance spectroscopy (EIS).REM conversion coating produced very corrosion resistant surface of Al 6061/SiCp MMC.The X ray diffraction (XRD) analysis revealed that REM conversion coatings exhibited non crystalline structure.The composition of REM conversion coating was studied by X ray photoelectron spectroscopy (XPS).The coatings consisted of cerium oxide and hydrated cerium oxide.Some of Ce3+were oxidized to Ce4+during the formation of the first layer coating in the solution containing Ce3+.During the course of exposing the specimens in open air,some of the residual Ce3+were oxidized to Ce4+.REM conversion coating formed in the solution containing Ce4+consisted entirely of Ce4+compounds. 展开更多
关键词 稀土转化膜 耐蚀性 铝基复合材料 表面处理
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采用复合钎料加压钎焊70%SiCp/Al复合材料 被引量:1
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作者 张德库 王恒 +1 位作者 康路路 孙彪 《焊接学报》 EI CAS CSCD 北大核心 2020年第6期67-71,I0004,I0005,共7页
采用机械球磨的方法制备了Al-Si-xSiC(x为体积分数)复合钎料,采用复合钎料实现了70%SiCp/Al复合材料的加压钎焊连接.利用SEM和EDS确定了钎缝是由α-Al,Si,SiC,Al2O3等相组成.结果表明,在压力作用下SiC颗粒被固定在钎缝区而使得钎缝区的... 采用机械球磨的方法制备了Al-Si-xSiC(x为体积分数)复合钎料,采用复合钎料实现了70%SiCp/Al复合材料的加压钎焊连接.利用SEM和EDS确定了钎缝是由α-Al,Si,SiC,Al2O3等相组成.结果表明,在压力作用下SiC颗粒被固定在钎缝区而使得钎缝区的组织类似于复合材料,钎缝中一定的SiC颗粒可以缓解母材与金属钎料之间的热膨胀系数之差,从而减小了焊接残余应力,可以提高接头的强度,而钎焊施加一定的压力则可促进钎料与SiC颗粒的润湿性.工艺适当时,接头最高强度达到125.7 MPa. 展开更多
关键词 sicp/6061al复合材料 钎焊 复合钎料 加压
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