Direct calciothermic reduction of porous calcium titanate to porous titanium

Xianjun Lei; Baoqiang Xu; Guobo Yang; Tengteng Shi; Dachun Liu; Bin Yang

doi:10.1016/j.msec.2018.05.027

Direct calciothermic reduction of porous calcium titanate to porous titanium

Mater Sci Eng C Mater Biol Appl. 2018 Oct 1:91:125-134. doi: 10.1016/j.msec.2018.05.027. Epub 2018 May 7.

Authors

Xianjun Lei¹, Baoqiang Xu², Guobo Yang¹, Tengteng Shi¹, Dachun Liu¹, Bin Yang³

Affiliations

¹ National Engineering Laboratory for Vacuum Metallurgy, PR China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Techonology, PR China; Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China.
² State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming University of Science and Technology, PR China; National Engineering Laboratory for Vacuum Metallurgy, PR China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Techonology, PR China; Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China. Electronic address: kmxbq@126.com.
³ State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming University of Science and Technology, PR China; National Engineering Laboratory for Vacuum Metallurgy, PR China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Techonology, PR China; Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China.

PMID: 30033239
DOI: 10.1016/j.msec.2018.05.027

Abstract

A metallurgical material integration concept, using porous calcium titanate (CaTiO₃) as raw material, was put forward for preparation of metallic titanium powder and porous titanium by calciothermic reduction. Porous metallic titanium was prepared by calcium vapor reduction at 1273 K for 6 h with two types of interconnected pores in titanium samples. The interconnected macropores about 50-300 μm were inherited from porous CaTiO₃, and the micropores about 5-40 μm were made by leaching removal of byproduct CaO in reduction products. Metallic porous titanium was fabricated in Ca-dissolved CaO-CaCl₂ molten salt mixtures by self-sintering and had a good interconnectivity inside with thickness about 155 μm and the porosities of the porous titanium are 65-81%.

Keywords: Ca-dissolved CaO-CaCl(2) molten salt; Calciothermic reduction; Porous calcium titanate; Porous titanium; Titanium.

MeSH terms

Calcium / chemistry*
Image Processing, Computer-Assisted
Materials Testing*
Models, Theoretical
Porosity
Spectrometry, X-Ray Emission
Thermodynamics
Titanium / chemistry*
X-Ray Diffraction

Substances

calcium titanate
Titanium
Calcium