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Ni含量对TiN-Ni金属陶瓷高温抗氧化性能的影响
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1.中国科学院上海硅酸盐研究所;2.上海航天控制技术研究所

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基金项目:

国家自然科学基金资助(51671209)


Effect of Ni Content on the High-Temperature Oxidation Resistance of TiN-Ni Cermets
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Affiliation:

1.Shanghai Institute of Ceramics,Chinese Academy of Sciences;2.Shanghai Aerospace Control Technology Institute

Fund Project:

the National Natural Science Foundation of China (51671209)

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    摘要:

    采用热压烧结方法,分别制备了三种含Ni 30vol%、50vol%以及70vol%的TiN-Ni金属陶瓷,研究了TiN-Ni金属陶瓷在800℃静态空气中的连续氧化行为。结果表明,烧结过程中,TiN相与Ni相之间无化学反应,调整Ni含量有助于烧结致密化,其中TiN/70Ni致密度最高,可达99.6%,有助于强化其高温抗氧化性。对氧化膜进行扫描电镜(SEM)、能谱分析(EDS)以及X射线衍射(XRD)分析,系统地研究了TiN-Ni复合材料的高温氧化机理,分析表明氧化过程分为快速氧化过程和慢速氧化过程,其中存在金属离子的外扩散和氧离子的内扩散。

    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.

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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,2020,49(2):595~599.[Duan Hang, Mo Honglei, Qiu Rongsheng, Chen Xie, 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.]
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  • 收稿日期:2019-03-19
  • 最后修改日期:2019-04-22
  • 录用日期:2019-10-23
  • 在线发布日期: 2020-03-12
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