摘要
使用高能球磨机械合金化方法,制取Al_2CoCrCu1/2FeMoNiTi高熵合金粉末,用X射线衍射仪、扫描电子显微镜、显微硬度计等对合金粉末进行了分析。结果表明,随着机械合金化时间的延长,金属元素高角度衍射峰先消失,接着低角度衍射峰矮化直至消失,最后出现新相的衍射峰。元素的合金化过程与熔点有关,熔点高的铬、镍合金化过程最慢。球磨1h,粉末结块较严重。球磨时间超过24h后,粉末颗粒比较均匀,约5μm。合金熔点在1 350~1 400℃范围,最大硬度值为80HV0.025。
The Al2 CoCrCu1/2 FeMoNiTi high entropy alloy powder was prepared by ball-milling mechanical alloying. X-ray diffractometer,scanning electron microscope and microhardness tester were employed to analyze microstructure and hardness. It is shown that with increasing the time of mechanical alloying, the high-angle XRD peaks of alloying elements disappear, and then those of low-angle peaks become weak until disappearing, finally the peaks of new phase form. Element alloying is related with its melting point, and chromium and nickel with a high melting point are alloyed slowly. After 1 h of ball milling, the alloy powder agglomerates seriously. The powder ball milled for more than 24 h becomes homogenetic and has a size of about 5 μm. The melting point is between 1 350- 1 400 ℃. The largest microhardness value is 80HV0 025.
出处
《金属功能材料》
CAS
2016年第4期44-47,共4页
Metallic Functional Materials
基金
广东省自然科学基金(2014A030313784)
关键词
高熵合金
机械合金化
球磨
粉末
high-entropy alloy
mechanical alloying
ball milling
powder
