机械合金化法合成Ti60Al40粉末及脉冲放电等离子烧结

Mechanical Alloying Ti60Al40 Powder and Spark Plasma Sintering

采用扫描电镜、X射线衍射仪、透射电镜对用机械合金化法制备的Ti60A l40纳米级粉末及其SPS烧结块体的形貌、组织及微观结构进行了研究。结果表明,Ti和A l的粉末随着球磨时间的延长有明显地细化趋势,球磨5h后产生非晶,20 h后完全接近非晶相。采用脉冲放电等离子烧结(SPS)技术,在1200℃温度下能够制备出较高硬度的Ti-A l金属间化合物块体材料。

The microstructure and mechanical properties of Ti60A140 powder prepared by mechanical alloying and sintered by the spark plasma sintering were researched by SEM, XRD and TEM. The results show that the powders of both Ti and Al have a trend of refining along with ball milling time, an amorphous phase occurs after 5 h milling and then a full amorphous phase develops after 20 h milling. With the SPS technology ,rather high hardness Ti-Al intermetallics can be made under 1200 ℃ temperature.