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段航,墨洪磊,仇荣生,陈勰,刘岩.Ni含量对TiN-Ni金属陶瓷高温抗氧化性能的影响[J].稀有金属材料与工程(英文),2020,49(2):595~599.[Duan Hang,Mo Honglei,Qiu Rongsheng,Chen Xie and Liu Yan.Effect of Ni Content on the High-Temperature Oxidation Resistance of TiN-Ni Cermets[J].Rare Metal Materials and Engineering,2020,49(2):595~599.]
Effect of Ni Content on the High-Temperature Oxidation Resistance of TiN-Ni Cermets
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Received:March 19, 2019  Revised:April 22, 2019
DOI:
Key words: TiN-Ni cermets  High-temperature oxidation resistance  Ni content
Foundation item:国家自然科学基金资助(51671209)
Author NameAffiliation
Duan Hang,Mo Honglei,Qiu Rongsheng,Chen Xie and Liu Yan  
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Abstract:
      Three kinds of TiN-Ni cermets containing Ni 30vol%, 50vol% and 70vol% were prepared by hot pressing sintering method. The continuous oxidation behavior of TiN-Ni cermet at 800 C in static air was studied. The results show that there is no chemical reaction between the TiN phase and the Ni phase during the sintering process, and the adjustment of Ni content contributes to the densification of sintering. The density of TiN/70Ni is the highest, up to 99.6%, which helps to strengthen its high temperature oxidation resistance. Scanning electron microscopy (SEM), energy spectrum analysis (EDS) and X ray diffraction (XRD) were used to study the mechanism of high temperature oxidation of TiN-Ni composites. The oxidation process was divided into rapid oxidation process and slow oxidation process, in which the external diffusion of metal ions and internal diffusion of oxygen ions existed.