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Preparation and High-Temperature Oxidation Performance Study of TiC-NiCr Cermet
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Southwest Petroleum University

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    Abstract:

    Cermets, known for their excellent hardness, strength, and wear resistance, have extensive applications in many industries. Currently, a significant research challenge involves enhancing the mechanical properties and oxidation resistance of metal-ceramics while reducing production costs through improvements in the ceramic phases and variations in the types and compositions of metals. In this study, we employed powder metallurgy to fabricate TiC-NiCr cermets and examined their oxidation behaviour at 900°C. The results revealed a uniformly structured TiC-NiCr cermets with excellent mechanical properties, exhibiting a Rockwell hardness value of (HRC65) and a flexural strength of 1450 MPa. This study investigates the high-temperature oxidation mechanism of TiC-based cermets using X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. Incorporating Ni and Cr elements, along with their solid solutions, not only bonds the hard phase TiC to ensure the physical performance of the cermet but also impedes internal diffusion during oxidation by forming a dense composite oxide layer, thereby enhancing its oxidation resistance. The TiC-NiCr cermet exhibited a dense protective oxide film at 900°C and endured continuous oxidation for approximately 1000 h. This paper presents a methodology for fabricating of TiC-NiCr metal matrix composites and evaluates their oxidation resistance, providing a theoretical and practical basis for enhancing both mechanical properties and oxidation resistance while reducing production costs.

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[张,huangbensheng, jiechuandi, chengen, dujiao, sunhaishen. Preparation and High-Temperature Oxidation Performance Study of TiC-NiCr Cermet[J]. Rare Metal Materials and Engineering,,().]
DOI:10.12442/j. issn.1002-185X.20240198

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History
  • Received:April 03,2024
  • Revised:May 09,2024
  • Adopted:May 20,2024
  • Online: June 17,2024
  • Published: