烧结温度对10TiB/Ti-4.5Al-6.8Mo-1.5Fe复合材料组织与性能的影响

被引:0
作者
郑玉凯 [1 ,2 ]
蔡一湘 [2 ]
陈峰 [2 ]
闫志巧 [2 ,3 ]
罗兵辉 [1 ]
机构
[1] 中南大学材料科学与工程学院
[2] 广州有色金属研究院粉末冶金研究所
[3] 中南大学粉末冶金国家重点实验室
关键词
钛基复合材料; 高速压制; 组织; 性能;
D O I
暂无
中图分类号
TB333 [金属-非金属复合材料];
学科分类号
摘要
以Ti、Al、Mo、Fe元素粉末及LaB6和TiB2粉末为原料,采用机械混合法制备钛基复合粉末,经高速压制成形后,分别在1 150、1 250和1 350℃下真空烧结制备以TiB晶须为增强体、钛合金Ti-4.5Al-6.8Mo-1.5Fe为基体的钛基复合材料。借助X射线衍射、金相显微镜和扫描电镜分析材料的物相组成和微观组织,测试复合材料的维氏硬度(HV2.0)和拉伸性能,研究烧结温度对复合材料的组织和力学性能的影响。结果表明:10TiB/Ti-4.5Al-6.8Mo-1.5Fe复合材料的相对密度随烧结温度升高而增加,烧结温度为1 350℃时达到最大值98.9%;TiB晶须的长径比随烧结温度升高显著降低。烧结温度为1 250℃时,该材料的维氏硬度和室温抗拉强度都达到最大值,分别为399HV和1 179 MPa。
引用
收藏
页码:546 / 551
页数:6
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