放电等离子烧结对TiB_2/AlCoCrFeNi复合材料组织与性能的影响
Effect of Spark Plasma Sintering on Microstructure and Properties of TiB_2/AlCoCrFeNi Composites
查看参考文献14篇
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文摘
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采用放电等离子烧结方法(SPS),制备体积分数5% TiB_2的等摩尔AlCoCrFeNi高熵合金基复合材料。通过密度测试、X射线衍射、扫描电镜及力学性能测试等方法,研究SPS烧结温度及烧结压力对复合材料的微结构演变与力学性能影响。结果表明:随着SPS烧结温度及烧结压力的增加,复合材料的硬度及抗压强度得到明显提高。在1200℃/30MPa进行SPS烧结后,复合材料的致密度达99.6%,抗压强度达2416MPa,屈服强度达1474MPa,硬度超过470HB。烧结过程中,复合材料的基体高熵合金发生相变,1200℃及30~45MPa烧结时,复合材料由BCC,B2,FCC,σ及TiB_2相组成。 |
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其他语种文摘
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The equal molar AlCoCrFeNi high entropy alloys with 5% (volume fraction)TiB_2particles reinforcement were fabricated by spark plasma sintering(SPS).Effect of SPS temperature and pressure on microstructure evolution and mechanical properties of TiB_2/AlCoCrFeNi composites was studied using X-raydiffraction(XRD),density testing,scanning electron microscopy(SEM)and mechanical properites testing.The results show that increasing SPS temperature and pressure can improve hardness and compressive strength of TiB_2/AlCoCrFeNi composites.The relative density,compressive strength,yield strength and hardness of the TiB_2/AlCoCrFeNi composite after sintering at 1200℃and 30MPa are 99.6%,2416MPa,1474MPa and 470HB,respectively.During spark plasma sintering,phase transformation occurs in the high entropy alloy matrix of the composite.The composite after sintering at 1200℃and 30-45MPa is composed of phases BCC,B2,FCC,TiB_2 and σ. |
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来源
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材料工程
,2018,46(3):22-27 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2016.000769
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关键词
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高熵合金基复合材料
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放电等离子烧结
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致密化
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显微组织
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力学性能
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地址
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1.
中南大学, 轻质高强结构材料国家重点实验室, 长沙, 410083
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中南大学, 粉末冶金国家重点实验室, 长沙, 410083
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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金属学与金属工艺 |
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基金
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湖南省自然科学基金
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国家自然科学基金
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文献收藏号
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CSCD:6226106
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