摘要
分别采用氢化钛粉、不规则形状Ti粉和球形Ti粉为钛源,与纯钨粉混合为原料粉末,通过高能球磨与真空热压烧结相结合的方法获得钨钛合金。通过X射线衍射仪、扫描电镜、维氏硬度仪等设备测量和分析钨钛合金的相组成、微观形貌、晶粒尺寸、相对密度及硬度。结果表明:三种钛原料制备的钨钛合金中均只观察到黑色的富钛相(β1(Ti,W))分布于灰色的富钨相(β_(2)(Ti,W))中,合金样品的相对密度均超过99%,达到了常规高性能靶材致密的要求。由于钛原料物化特性的差异,导致其所制备的钨钛合金微观组织中β1(Ti,W)的分布及粒径尺寸存在差别,其中以氢化钛粉为钛原料制备的钨钛合金性能最佳,其β1(Ti,W)分布均匀且晶粒尺寸细小,钨、钛之间的互扩散速率更高,进而固溶度更高,合金相对密度和力学性能最好,相对密度为99.66%,硬度为HV(678.88±15.25)。
Tungsten-titanium alloys were obtained by high-energy ball milling and vacuum hot-pressing sintering,using titanium hydride powders,irregularly shaped Ti powders,and spherical Ti powders as the titanium source,mixing with pure tungsten powders as the raw materials.The phase composition,microstructure,grain size,relative density,and hardness of tungsten-titanium alloy were measured and studied by X-ray diffractometer,scanning electron microscope,and Vickers hardness tester.The results show that the black titanium-rich phases(β1(Ti,W))are observed to be distributed in the gray tungsten-rich phases(β_(2)(Ti,W))of the tungsten-titanium alloys using the three titanium source.The relative density of all these samples exceeds 99%,meeting the compactness requirements for the conventional high-performance target materials.Due to the physicochemical difference of the titanium source,the distribution and particle size ofβ1(Ti,W)in the tungsten-titanium alloys are different.The tungsten-titanium alloys prepared with TiH2 powders as the titanium source show the best performance.Theβ1(Ti,W)distribution is uniform,and the grain size is fine;the mutual diffusion rate between tungsten and titanium is higher,and the solid solubility is higher;the relative density and mechanical properties are the best,the relative density is 99.66%,and the hardness is HV(678.88±15.25).
作者
许彦亭
赵琪
沈月
赵宗彦
王传军
施晨琦
闻明
XU Yanting;ZHAO Qi;SHEN Yue;ZHAO Zongyan;Wang Chuanjun;SHI Chenqi;WEN Ming(Kunming Precious Materials&Technology Co.,Ltd.,Kunming 650106,China;Sino-Platinum Metals Co.,Ltd.,Kunming 650106,China;Yunnan Precious Metals Laboratory Co.,Ltd.,Kunming 650106,China;Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)
出处
《粉末冶金技术》
北大核心
2025年第3期317-324,共8页
Powder Metallurgy Technology
基金
云南省重点研发计划(军令状)资助项目(202203ZA080001)
云南贵金属实验室有限公司基础研究资助项目(YPML-2023050227)。
关键词
钨钛合金
钛原料
靶材
相组成
晶粒尺寸
tungsten-titanium alloys
Ti raw materials
target materials
phase composition
grain size
作者简介
通信作者:闻明,E-mail:wen@ipm.com.cn。
