当前位置: X-MOL 学术Int. J. Refract. Met. Hard Mater. › 论文详情
Fabrication of niobium carbide coating on niobium by interstitial carburization
International Journal of Refractory Metals & Hard Materials ( IF 2.794 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.ijrmhm.2020.105187
Ziyuan Zhao; Pengfei Hui; Fuyuan Liu; Yunhua Xu; Lisheng Zhong; Mingxuan Zhao

Ceramic coatings on niobium substrates are fabricated by hot-pressing the niobium with cast iron at 1100 °C. The interstitial carbon atoms diffuse into the niobium, and NbC and Nb2C precipitate in the surface, forming a ceramic coating. The total volume fraction of the ceramic phases in the coating reaches 92%, and the grain size is in the range of 170–1000 nm. Both the volume fraction and the grain size of the ceramic phases decrease with increasing depth with respect to the coating surface, displaying a gradient microstructure. In the coating, the crystallographic orientations of NbC and Nb2C are randomly distributed. In the substrate, some isolated NbC and Nb2C nuclei exhibit the Kurdjumov–Sachs orientation relationship and the Porter orientation relationship with the matrix respectively, namely 11¯1101¯NbC//11¯0111¯Nb and 101¯00001Nb2C//11011¯5Nb. The coating remarkably improves the surface hardness of the niobium from 110 HV to 1600 HV, and it is strongly bonded with the substrate.
更新日期:2020-01-07

 

全部期刊列表>>
Springer Nature 2019高下载量文章和章节
化学/材料学中国作者研究精选
《科学报告》最新环境科学研究
ACS材料视界
自然科研论文编辑服务
中南大学国家杰青杨华明
剑桥大学-
中南大学
材料化学和生物传感方向博士后招聘
课题组网站
X-MOL
北京大学分子工程苏南研究院
华东师范大学分子机器及功能材料
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug