摘要
采用连续波Nd-YAG激光在氮气环境中对金属钛进行激光气体氮化处理。利用SEM,XRD,XPS研究氮化层的显微组织、表面成分、结构。结果表明:通过激光气体氮化可以在金属钛表面得到表面相对平滑、无裂纹的氮化层;氮化层与基体材料之间为冶金结合。氮化层主要由枝晶状TiN组成,同时有TiNxOy,TiO2及TiC存在,外表面有C,O污染或吸附;TiN枝晶密度由表面沿深度方向下降。
A continuous wave Nd-YAG laser was used to perform laser gas nitriding on titanium. The microstructure, surface composition and structure were investigated by SEM , XRD and XPS. The results showed that a relatively smooth and crack-free nitrided layer was obtained on titanium by laser gas nitriding. Metallurgical bonding between the nitrided layer and Ti substrate was observed. The outmost surface of the nitrided layer was found to be comprised of dendritic TiN, TiNxOy, TiO2 and TiC. Carbon and oxygen contamination were detected on the outmost surface of the sample. The intensity of the TiN dendrite in the nitrided layer decreased with increasing depth.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2004年第4期3-6,10,共5页
Journal of Materials Engineering
基金
天津市自然科学基金研究重点项目(043803311)
