CAJ | 학술논문

使用NH3在氮化炉中对纯钛铸件进行辉光等离子渗氮.分别应用X线衍射仪XRD、显微硬度计、扫描电镜、摩擦磨损实验及电化学实验研究等离子渗氮对纯钛铸件机械性能、摩擦学性能、耐腐蚀性的影响.铸造纯钛表面氮化处理后,颜色呈暗金黄色,表面由TiN、Ti_2N相及氮在钛中的固溶体α-Ti(N)组成,显微硬度、耐磨性显著提高,在人工唾液中的耐腐蚀性亦明显提高.
사용NH3재담화로중대순태주건진행휘광등리자삼담.분별응용X선연사의XRD、현미경도계、소묘전경、마찰마손실험급전화학실험연구등리자삼담대순태주건궤계성능、마찰학성능、내부식성적영향.주조순태표면담화처리후,안색정암금황색,표면유TiN、Ti_2N상급담재태중적고용체α-Ti(N)조성,현미경도、내마성현저제고,재인공타액중적내부식성역명현제고.
The surfaces of pure titanium casts were modified with plasma nitridation in NH3 environment.The impacts of surface modification conditions,including the pressure,sample temperature and nitridation time etc.,on the mechanical properties of the surfaces were studied.The microstructures and properties were characterized with X-ray diffraction (XRD),scanning electron microscopy (SEM) and conventional mechanical probes.The results show that the plasma nitridation significantly improves the properties of the Ti casts,and changes its stoichiometry.For instance,the modified Ti casts have much higher wear resistance,surface hardness,and corrosion resistance against the artificial saliva.And its color changed into dark-golden;the TiN,Ti_2N and α-Ti(N) phases were observed in its surfaces.