金属间化合物对Ti基复合材料的影响
Effects of Intermetallics on Properties of Ti-based Composite
李志铮, 李晓枫, 龙 红
点击：5146次 下载：0次
作者单位：广东省珠海市质量计量监督检测所, 广东 珠海 519000
中文关键字：金属间化合物； Ti基复合材料； 金相组织； 耐压强度
英文关键字：intermetallic; Ti-based composite; microstructure; compressive strength
中文摘要：通过熔铸法原位合成了(Ti3Sn+Ti5Si3)增强Ti基复合材料，利用扫描电镜观察了包含相间隔的细晶粒Ti基体与Ti3Sn和Ti与Ti5Si3组成的共晶组织。对试样进行室温下的压缩性能测试，结果表明，随着Sn含量的增加，试样的杨氏模量和耐压强度都比Ti-Si合金高；当Sn含量达到25wt% 时，试样的杨氏模量和耐压强度降低，但压缩率有所升高。
英文摘要：Ti-based composite reinforced with eutectic Ti3Sn+Ti5Si3 intermetallics was prepared by non-consumable vacuum arc melting. The composites exhibite a hypoeutectic microstructure with primary Ti solid solution and Ti3Sn phases, plusing eutectic Ti+Ti5Si3, which can be observed by using SEM. The room temperature compressive test results show that the Young's modulus and ultimate compressive strength (UCS) of the composites are higher than that of the Ti-Si hypoeutectic alloy with the increase of Sn. When Sn reaches 25wt% , the Young's modulus and ultimate compressive strength begin to fall, while the compression ratio rises.