Gelcasting of titanium hydride to fabricate low-cost titanium

作     者：Qing Ye Zhi-Meng Guo Jian-Ling Bai Bo-Xin Lu Jun-Pin Lin Jun-Jie Hao Ji Luo Hui-Ping Shao 

作者机构：Institute for Advanced Materials and Technology University of Science and Technology Beijing State Key Laboratory of Advanced Metals and MaterialsUniversity of Science and Technology Beijing 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2015年第34卷第5期

页      面：351-356页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51274039) the State Key Laboratory of Advanced Metals and Materials(No.2012-ZD04) 

主　　题：Gelcasting Titanium hydride Powder metallurgy Sintering Titanium 

摘      要：In this work, low-cost titanium was fabricated by gelcasting of titanium hydride powder. The effects of morphology and grain composition of powder raw material and solid loading on the rheological behavior of gelcasting slurry were studied. The degreasing, dehydriding and sintering behaviors of gelcasted green body were investigated by differential thermal analysis （DTA） and dilatometer. The results show that the solid loading of titanium hydride slurry reaches 50 vol%. Combination of dehydriding and sintering in one process accelerates the densification, and the relative sintered density of the final part achieves 96.5 %. In order to test the ability of gelcasting process for fabricating structural materials, a resin handle produced by 3D printing technology was used as a model and a titanium handle was successfully fabricated. Higher solid loading and better sinterability of titanium hydride powder promote manufacture of bulk titanium with high relative density, complex shape and well-defined microstructure.