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纳/微米双尺度SiC颗粒增强铝基复合材料的性能研究 被引量:1
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作者 王京 孙安娜 东星倩 《智能计算机与应用》 2020年第2期360-364,共5页
采用真空吸铸工艺制备了单一纳米、单一微米以及纳/微米双尺度SiC颗粒增强铝基复合材料,分析研究了SiC颗粒的质量分数和尺度大小对增强铝基复合材料的微观结构和力学性能的影响规律。结果表明:随着纳米SiC颗粒含量的增加,纳米SiC颗粒增... 采用真空吸铸工艺制备了单一纳米、单一微米以及纳/微米双尺度SiC颗粒增强铝基复合材料,分析研究了SiC颗粒的质量分数和尺度大小对增强铝基复合材料的微观结构和力学性能的影响规律。结果表明:随着纳米SiC颗粒含量的增加,纳米SiC颗粒增强铝基复合材料的硬度和抗拉强度及伸长率呈先增大后减小的变化趋势。当加入纳米SiC颗粒质量分数为2%时,硬度和抗拉强度分别达到了81.2HV和285.9MPa,较基体(62.5HV和215.2MPa)分别提高了29.9%和32.8%。纳/微米双尺度SiC颗粒作为增强体时,复合材料中的均匀分散性得到改善,增强铝基复合材料的硬度和抗拉强度达到了98.6HV和298.2MPa,较基体(62.5HV和215.2MPa)分别提高了57.7%和38.5%。对比单一纳米及单一微米SiC颗粒作为增强体时,纳/微米双尺度SiC颗粒增强铝合金复合材料表现了更好的综合性能。 展开更多
关键词 制备工艺 纳/微米sic颗粒 sic/ZL204A复合材料 质量分数 力学性能
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Microstructure and properties of alumina-silicon carbide nanocomposites fabricated by pressureless sintering and post hot-isostatic pressing 被引量:4
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作者 Young-Keun JEONG Koichi NIIHARA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第A01期1-6,共6页
A1203/5%SIC nanocomposites were fabricated by pressureless sintering using MgO as a sintering aid and then post hot-isostatic pressed (HIP), which can subsequently break through the disadvantage of hot-pressing proc... A1203/5%SIC nanocomposites were fabricated by pressureless sintering using MgO as a sintering aid and then post hot-isostatic pressed (HIP), which can subsequently break through the disadvantage of hot-pressing process. The MgO additive was able to promote the densification of the composites, but could not induce the grain growth of A1203 matrix due to the grain growth inhibition by nano-sized SiC particles. After HIP treatment, A12OJSiC nanocomposites achieved full densification and homogeneous distribution of nano-sized SiC particles. Moreover, the fracture morphology of HIP treated specimens was identical with that of the hot-pressed A1203/SiC nanocomposites showing complete transgranular fracture. Consequently, high fracture strength of 1 GPa was achieved for the A1203/5%SIC nanocomposites by pressureless sintering and post HIP process. 展开更多
关键词 NANOCOMPOSITE pressureless sintering fracture strength
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