Uniting superhardness and damage-tolerance in a nanosandwich-structured Ti-B-N coating

SCRIPTA MATERIALIA

卷:74

Article

Xu, Jiang^1,2  Li, ZhengYang³  Xie, Zong-Han^4,5  Munroe, Paul⁶ 

[1] Nanjing Univ Aeronaut & Astronaut, Dept Mat Sci & Engn, Nanjing 210016, Jiangsu, Peoples R China

[2] Wuhan Inst Technol, Sch Mech & Elect Engn, Wuhan 430073, Peoples R China

[3] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China

[4] Univ Adelaide, Sch Mech Engn, Adelaide, SA 5005, Australia

[5] Edith Cowan Univ, Sch Engn, Joondalup, WA 6027, Australia

[6] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

关键词: Nanocomposite;    Surface modification;    Mechanical properties;    Toughness;   

DOI  :  10.1016/j.scriptamat.2013.11.004

来源: Elsevier

【 摘 要 】

A novel nanosandwich-structured Ti-B-N coating was prepared on a Ti-6Al-4V substrate using a double glow discharge plasma technique. This coating consists of alternating Ti(N,B) nanocrystalline layers, containing nanoscale growth twins, and amorphous TiB2-BN layers. Compared with a monolithic TiB2.06 nanocrystalline coating, the new Ti B N coating exhibits a marked increase in both damage resistance and hardness (i.e. similar to 55 GPa). The enhanced mechanical properties were found to stem from a combination of nanostructuring and nanotwinning effects. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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