Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Mechanical Properties and Thermal Stability of Ti0.5Al0.5N/CrN Nano-multilayered Coatings

Ti0.5Al0.5N/CrN 나노 다층 박막의 기계적 성질과 열적 안정성

  • Ahn, Seung-Su (KORLOY) ;
  • Park, Jong-Keuk (Korea Institute of Science and Technology) ;
  • Oh, Kyung-Sik (School of Advanced Materials Engineering, Industrial Technology Center for Environment-friendly Materials, Andong National University) ;
  • Chung, Tai-Joo (School of Advanced Materials Engineering, Industrial Technology Center for Environment-friendly Materials, Andong National University)
  • 안승수 (한국야금) ;
  • 박종극 (한국과학기술연구원) ;
  • 오경식 (국립안동대학교 신소재공학부 친환경신소재산업지원센터) ;
  • 정태주 (국립안동대학교 신소재공학부 친환경신소재산업지원센터)
  • Received : 2020.10.05
  • Accepted : 2020.10.20
  • Published : 2020.10.28
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Abstract

Ti0.5Al0.5N/CrN nano-multilayers, which are known to exhibit excellent wear resistances, were prepared using the unbalanced magnetron sputter for various periods of 2-7 nm. Ti0.5Al0.5N and CrN comprised a cubic structure in a single layer with different lattice parameters; however, Ti0.5Al0.5N/CrN exhibited a cubic structure with the same lattice parameters that formed the superlattice in the nano-multilayers. The Ti0.5Al0.5/CrN multilayer with a period of 5.0 nm exceeded the hardness of the Ti0.5Al0.5N/CrN single layer, attaining a value of 36 GPa. According to the low-angle X-ray diffraction, the Ti0.5Al0.5N/CrN multilayer maintained its as-coated structure up to 700℃ and exhibited a hardness of 32 GPa. The thickness of the oxidation layer of the Ti0.5Al0.5N/CrN multilayered coating was less than 25% of that of the single layers. Thus, the Ti0.5Al0.5N/CrN multilayered coating was superior in terms of hardness and oxidation resistance as compared to its constituent single layers.

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