PREPARATION OF NICKEL-COATED ALUMINA COMPOSITE POWDER BY AN AQUEOUS-PHASE REDUCTION PROCESS

被引:27
作者
KANG, BS
WON, CW
CHUN, BS
SOHN, HY
机构
[1] CHUNGNAM NATL UNIV,DEPT ENGN MET,TAEJON 305764,SOUTH KOREA
[2] UNIV UTAH,DEPT MET ENGN,SALT LAKE CITY,UT 84112
关键词
D O I
10.1007/BF01153950
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A nickel coating on the surface of alumina particles, used as a reinforcement in metal-ceramic composite materials, substantially improves their wettability by molten metals. Nickel was deposited on alumina particles by reducing nickel ions from a solution under hydrogen pressure in the presence of ammonia as a complexing agent. It was found that the addition of Fe2+ ions and anthraquinone was necessary for forming an adequate nickel coating on the alumina surface. The optimum conditions were the [NH3]/[Ni2+] ratio of 1.6, 2760 kPa hydrogen pressure, 175 degrees C, and an anthraquinone addition of 0.04 gl(-1).
引用
收藏
页码:3883 / 3887
页数:5
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