摘要
对Ni W纳米结构梯度镀层进行热处理 ,结果表明 :40 0℃热处理 1h后 ,镀层结构未发生改变 ,硬度高达Hv13 0 0 ,优于硬Cr镀层 ;60 0℃热处理 1h后 ,镀层结构由原来的以Ni为溶剂、W为溶质的固溶体转变为存在单一相Ni和W的多晶结构 .热处理并未改变Ni W梯度镀层中W含量的梯度分布 .Ni W纳米结构梯度镀层具有优良的高温氧化性能 。
This paper studied the heat resistance and high-temperatu re oxidation resistance of Ni-W gradient deposit with nanostructure. Experiments results indicated that the Ni-W gradient deposit still kept original structure after heat treatment at 400 ℃, and the hardness of the deposit was as high as Hv 1300,better than the hard Chromium deposit. XRD test shows that the structu re of the Ni-W gradient deposit has changed from a displacement solid solution made up of solvent Ni and solute W to a polycrystal structure made up of Ni and W after heat treatment at 600 ℃. Also, the W content remained the gradient di stribution in the deposit. Furthermore, the Ni-W gradient deposit had good hig h-temperature oxidation resistance, suitable for the high-temperature oxidatio n circumstances.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2003年第2期237-240,共4页
CIESC Journal
基金
国家自然科学基金资助项目 (No .5 96710 5 8)~~
