Ni-W-P-Al_2O_3复合镀层的制备与抗高温氧化性能  

Preparation of Ni-W-P-Al_2O_3 composite coating and its high-temperature oxidation resistance

作　　者：兰晔峰[1,2] 李进宝[1] 李斌强[1] 陶繁 李庆林[1,2] 

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2017年第4期1-6,共6页Journal of Lanzhou University of Technology

基　　金：甘肃省部共建有色金属先进加工与再利用国家重点实验室开放基金(SKL1305)的资助

摘　　要：采用直流电沉积技术制备了Ni-W-P-Al_2O_3复合镀层,通过控制镀液中Al_2O_3颗粒的质量浓度及颗粒的粒径,研究了Al_2O_3颗粒对复合镀层表面微观形貌、镀层厚度及抗高温氧化性的影响,并对复合镀层的附着力强度进行了测试.结果表明:通过控制镀液中Al_2O_3颗粒的质量浓度可以获得不同成分的复合镀层;一定质量浓度的Al_2O_3颗粒可以细化Ni-W-P合金镀层的胞状组织,并且纳米颗粒对镀层的细化效果明显优于微米颗粒;Al_2O_3颗粒的质量分数和尺寸对Ni-W-P-Al_2O_3复合镀层的厚度有明显的影响;镀液中Al_2O_3颗粒的质量浓度为15g/L时所得镀层的抗高温氧化性最好;镀层附着力达到1级标准,Ni-W-P合金复合镀层与基体结合良好.Ni-W-P-Al2O3 composite coating was prepared with DC electro deposition technique, the effect of Al2O3 particles on surface microscopic morphology, thickness, and high-temperature oxidation resistance of composite coating was investigated through controlling the mass concentration and size of the Al2O3 particles in plating bath, and the bonding strength of the composite coating was tested. The result showed that composite coatings with different components could be obtained through controlling the mass concentration and size of Al2O3 particles in plating bath. Al2O3 particles with certain mass concentration would be able to refine the cellular microstructure of Ni-W-P alloy coating and the refining result of nano-Al2O3 particles would obviously be superior to that of micro-Al2O3 particles. The mass-fraction and size of Al2O3 particles would have a remarkable effect on the thickness of Ni-W-P-Al2O3 composite coating. The high-temperature oxidation resistance of coating obtained would be the best when the mass concentration of Al2O3 particles in plating bath was 15 g/L, the coating adhesion strength would reach first-class stand-ard, and the bonding of Ni-W-P alloy coating to the matrix would be fine.

关 键 词：Ni-W-P-Al2O3复合镀层 微观形貌 镀层厚度 抗高温氧化性 附着力 

分 类 号：TG174[金属学及工艺—金属表面处理]