Articles
  • Fabrication of coarse grain yttria composite and its corrosion resistance to molten titanium 
  • Jingkun Yua, Chengwan Cuia,b, Xinzhong Tianc, Chun Wangd, Xinli Wanga and Wenbin Daia,*
  • a Northeastern University, 313Box, Wenhua Road, Heping District, Shenyang, 110004, P. R. China b China First Heavy Industries, Changqian Road, Fularji District, Qiqihar, 161042, P. R. China c Xingtai Iron and Steel Corp., Ltd, South Gangtie Road, Xingtai, 054027, P. R. China d Yingkou Qinghua Refractory Material Co., Ltd., Panlong Road, Dashiqiao, 115100, P. R. China
Abstract
To fabricate coarse yttria grain with closed pores for improving the thermal shock resistance of yttria, a proper additive wasfirstly selected among calcium nitrate, cerium nitrate, and neodymium nitrate. Then, the appropriate amount of calcia addedinto yttria was investigated. Finally, the corrosion resistance of the fabricated yttria crucible was compared with pure calcia,and magnesia crucible. The results reveled that by adding 1 mol% calcia, lots of closed pores were distributed in coarse yttriagrains and the composite has superior thermal shock resistance and excellent corrosion resistance with titanium alloy. Thenewly fabricated yttria might fit for the melting and casting of pure titanium and its alloys.

Keywords: Additive, Yttria, Interface, Titanium alloy

This Article

  • 2016; 17(10): 1042-1045

    Published on Oct 31, 2016