取称量后的超高纯W及高纯Ti/TiH2粉末,其中TiH2在“Ti”成分中占比39%~90%,放入混合了一定比例钨球的V型混料机进行均匀混料,物料以钛箔包裹后置于石墨模具,在真空热压炉内开展高温高压烧结试验,选取烧结温度1400℃、压力25MPa、保温时间60min,并在700 ℃时保温3.5 h。扫描电镜采集方案:首先对样品表面进行机械研磨,以氧化铝混合液进行抛光处理。通过带有背散射电子成像的场发射电子扫描电镜(SEM)观察合金的微观组织。其中SEM加速电压20KV,放大倍数3000×。通过样品的SEM显微组织,分析样品的第二相分布规律。
After weighing, ultra-high purity W and high purity Ti/TiH2 powders, in which TiH2 accounts for 39%~90% of the "Ti" composition, were put into a V-shaped mixer mixed with a certain proportion of tungsten spheres for uniform mixing. The materials were wrapped with titanium foil and placed in a graphite mold, and sintering tests were carried out at high temperature and high pressure in a vacuum hot pressing furnace. Sintering temperature 1400℃, pressure 25MPa, holding time 60min, and holding time 3.5h at 700 ℃ were selected. Scanning electron microscope acquisition scheme: Firstly, the sample surface was mechanically ground and polished with alumina mixture. The microstructure of the alloy was observed by field emission electron scanning electron microscopy (SEM) with backscattered electron imaging. The SEM acceleration voltage is 20KV and the amplification factor is 3000×. The second phase distribution of the sample was analyzed by SEM microstructure.