Al_2O_3陶瓷表面化学气相沉积Ni涂层及其与Cu润湿性

Nickel Coating on Alumina Ceramic Surface by Chemical Vapour Deposition and Its Wettability with Copper

将NiCl2·6H2O经过脱水干燥后得到的NiCl2粉末作为原料,采用化学气相沉积技术通过H2还原反应,在Al2O3陶瓷表面沉积了Ni涂层。研究了涂层的相组成、涂层与Al2O3陶瓷结合力和涂层与铜熔液间的润湿行为。结果表明:制备的涂层中的主要组分为Ni,Ni涂层均匀、致密,厚度可达40μm,且涂层与陶瓷之间的结合良好。座滴法测得沉积Ni涂层的Al2O3陶瓷与Cu之间的润湿角为30.15°,表明涂层明显改善了陶瓷与金属间的润湿性。

The metal nickel （Ni） on the surface of alumina （Al203 ） ceramic was deposited with NiCl2 powder as a raw material by a chemical vapor deposition technique and subsequent H2 reduction treatment. The phase composition, adhesion between the coating and Al2 03 ceramics and wetting behavior between the coating and molten copper were investigated. The resurts indicate that main component is Ni in the prepared coating, the Ni coating with the thickness of 40 μm is uniform and dense. The effec- tive binding between the Ni coating and A12 03 ceramic occurs. The contact angle between Ni-coated A12 03 ceramic and molten copper is 30. 15° measured by a sessile drop test, showing the improvement of the wettability between ceramic and metal due to the coating.