【摘要】 本文作者使用 Fe- Al烧结助剂 ,在 14 73K的热压烧结条件下成功制备出了整体致密、密度沿厚度方向呈特定分布的 W- Mo- Ti体系密度梯度飞片材料。研究表明 ,低熔点 Al的添加 ,使部分烧结助剂 Fe以液态形式存在 ,提高了 Fe的活化烧结能力。 W- Mo,Mo- Ti合金的烧结均为液相烧结过程 ,W- Mo合金主要通过形成少量粘结相和液相来粘结 W,Mo晶粒 ,而 Mo- Ti合金则通过形成部分 Mo- Ti固溶体来实现致密化更多还原

【Abstract】 A new kind of flier plate material with graded density has come to show great potential for the application in dynamic high pressure technology. In the present paper, W Mo Ti system was chosen to prepare such graded density flier plate materials. It is found that the Fe Al additives were suitable for the hot pressing of W alloy, W Mo alloys and Mo Ti alloys at a low temperature of 1473 K. The mechanism of the densification could be expressed as follows: Part of Fe powders dissolved into the liquid due to the addition of Al and thus displayed more active feature during the sintering, which promoted the formation of bonding phase in W Mo alloys and solid solution in Mo Ti alloys, and evidently improved their relative densities. Finally, a wholly dense W Mo Ti graded density flier plate material was successfully fabricated. Its density changed gradually from 4.5×10 3 kg/m 3 up to 17.0×10 3 kg/m 3.更多还原