Gelcasting of titanium hydride to fabricate low-cost titanium
来源期刊：Rare Metals2015年第5期
论文作者：Qing Ye Zhi-Meng Guo Jian-Ling Bai Bo-Xin Lu Jun-Pin Lin Jun-Jie Hao Ji Luo Hui-Ping Shao
文章页码：351 - 356
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 achieves96.5 %. In order to test the ability of gelcasting process for fabricating structural materials, a resin handle produced by3 D 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.
Qing Ye1，Zhi-Meng Guo1,2，Jian-Ling Bai1，Bo-Xin Lu1，Jun-Pin Lin2，Jun-Jie Hao1，Ji Luo1，Hui-Ping Shao1
1. Institute for Advanced Materials and Technology, University of Science and Technology Beijing2. State Key Laboratory of Advanced Metals and Materials,University of Science and Technology Beijing
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 achieves96.5 %. In order to test the ability of gelcasting process for fabricating structural materials, a resin handle produced by3 D 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.
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