首页 | 本学科首页   官方微博 | 高级检索  
     


Plasma- and vacuum-plasma-sprayed Cr3C2 composite coatings
Authors:JD Reardon  R Mignogna  FN Longo
Affiliation:Materials Engineering Department, Metco Inc., Westbury, NY 11590 U.S.A.
Abstract:Plasma- and detonation-sprayed chromium carbide-Nichrome coatings have long been used for applications requiring superior wear resistance at temperatures up to 820°C. The coatings are typically sprayed from mechanical blends of powder containing from 17 to 35 wt.% Nichrome. These coatings are susceptible to non-uniformity of microstructure because of segregation of the blended powders. Oxide formation occurs in both ambient atmosphere plasma and detonation-applied coatings.A new Cr3C2/>Nichrome composite powder was developed for application by the plasma and vacuum plasma processes. The developed material consists of 50 wt.% Cr<sub>3</sub>C<sub>2</sub> clad with 50 wt.% 80-20 Nichrome. Unlike powder blends, each Cr<sub>3</sub>C<sub>2</sub> powder particle is clad with an essentially continuous layer of Nichrome. The developed material is sized ?270 mesh + 5 μm.Coatings of the composite Cr<sub>3</sub>C<sub>2</sub> material were sprayed using the conventional non-transferred arc plasma and the low pressure low oxygen vacuum plasma processes. These coatings were compared with coatings sprayed from a commercially available blend of 75 wt.% Cr<sub>3</sub>C<sub>2</sub><img style=
Keywords:
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号