Thermal stability of nanostructured NiCrC coating prepared by HVAF spraying of cryomilled powders

查看全文 作　　者：CUI [1]Hua;TAO [2]Kai;ZHOU [2]Xianglin;ZHANG [2]Jishan

机构地区：[1]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;[2]State Key laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Rare Metals》索引2008年第27卷第4期,共7页

基　　金：the National High Technology Research and Development Program of China (No.2002AA331080) 摘　　要：Thermal stability of nanostructured NiCrC coating prepared by high velocity air-fuel (HVAF) spraying of cryomilled feedstock powders was investigated. Transmission electron microscopy (TEM), differential scanning calorimetry (DSC), and X-ray diffraction (XRD) were utilized for characteristic analysis. Recrystallization and normal grain growth occur when isothermal treatment is performed at 923 K (0.55 TM) for up to 100 h, and the average grain size increases from initial 41 nm for as-deposited state to around 100 nm for nearly equilibrium state. Iso-chronal treatment at 823 K and 1023 K was also conducted for comparison. Accordingly, for 0.49 to 0.61 T/TM, the time exponent n deduced from D 1/n-D 1/n 0= ktincreases from 0.15 to 0.30. The observed high thermal stability is attributed primarily to a Zener pinning mechanism arising from the fine Cr2O3 dispersions and the solute drag effect as well. 关键词：涂料晶体生长燃料热处理

相关文献

参考文献（19）
引证文献（4）
耦合文献（0）

参考文献(19)

引证文献(4)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Thermal stability of nanostructured NiCrC coating prepared by HVAF spraying of cryomilled powders

参考文献(19)

引证文献(4)

用户提示