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热处理对钼-硅系金属间化合物显微组织和力学性能的影响
The Effect of Heat Treat on Microstructure and Mechanical Properties of Intermetallics in Mo-Si System
【摘要】 以纯金属钼与纯硅为原料,通过电弧熔炼法制备了钼-硅系金属间化合物:Mo5Si3-Mo-Si2亚共晶和过共晶。在1 200℃分别对两种合金进行了真空退火。观察层状结构在合金中的形成、变化及重构。退火48h后在亚共晶合金中发现了发展完好的Mo5Si3(D8m)/MoSi2(C11b)层状结构,层间距为几百纳米。测量了各合金退火前后的维氏硬度,研究了显微组织变化对维氏硬度的影响。
【Abstract】 The intermetallics of Mo5Si3-MoSi2 hypoeutectic alloy and hypereutectic alloy in Mo-Si system were prepared by arc-melting high purity elements（99.9%Mo and 99.99%Si） in argon.The arc-melting buttons were then annealed at 1 200℃.The formation,alternation and reconstruction of lamellar structure were observed in alloys.After annealing for 48h,the well-developed lamellar structure consisted of Mo5Si3（D8m）/MoSi2（C11b） with fine spacing of hundred nanometer order was found in Mo5Si3-MoSi2 hypoeutectic alloy.The Vickers hardness of all alloys was determined.The relationship between microstructure and Vickers hardness was investigated.
【Key words】 Mo-Si system； intermetallics； microstructure； mechanical property；
- 【文献出处】 机械工程材料 ,Materials For Mechanical Engineering , 编辑部邮箱 ,2004年04期
- 【分类号】TG113;
- 【被引频次】3
- 【下载频次】121