Research on Preparation of Zr(OH)4/B4C Composite Powder by Different Processes
B4C, ZrOCl2· 8H2O, and dilute ammonia were used as experimental materials to study the characteristics of Zr(OH)4-coated B4C synthesized by normal titration, reversing titration and hydrolysis. The effects of titration speed and pH value on the coating results of composite powders, and the effect of pre-calcination temperature on the composition of composite powders were studied. The study results indicated that the optimal effect of Zr(OH)4-coated B4C could be obtained by normal titration. In normal titration, the optimal effect could be obtained when the titration speed was 1 ml·min-1 and the pH value was 9. Adding Y2O3 could promote the formation of ZrB2. At the pre-calcination tempera ture of 1300 ℃× 1 h, Zr(OH)4/B4C powder turned into ZrB2/B4C composite powder.
ceramic composite material powder ZrO2/B4C heterogeneous nucleation process
Liu Rong Ru Hongqiang Guo Kai Tang Di
School of Material Science & Engineering, University of Science and Technology Beijing, Beijing 1000 School of Materials &Metallurgy, Northeastern University, Shenyang 110004, China School of Material Science & Engineering, University of Science and Technology Beijing, Beijing 1000
国际会议
海口
英文
340-344
2006-11-13（万方平台首次上网日期，不代表论文的发表时间）