Mechanical properties of Cr-alloyed MoSi2-based nanocomposite coatings with a hierarchical structure

JOURNAL OF ALLOYS AND COMPOUNDS

卷:565

Article

Xu, Jiang¹  Wu, Jia Di¹  Li, Zhengyang²  Munroe, Paul³  Xie, Zong-Han⁴ 

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

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

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

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

关键词: Transition metal silicides;    First-principle calculation;    Nanocomposite;    Mechanical properties;    Residual stresses;   

DOI  :  10.1016/j.jallcom.2013.02.134

来源: Elsevier

【 摘 要 】

Novel Cr-alloyed MoSi2-based nanocomposite coatings were successfully synthesized onto Ti-6Al-4V substrates by a double glow discharge plasma technique. The architecture of the nanocomposite coatings exhibited a hierarchical structure, consisting of equiaxed C40-MoSi2 with a bimodal grain size distribution and strip-shaped Mo5Si3 grains segregated to the boundaries of submicron MoSi2 grains. The results showed that the toughness of the MoSi2-based nanocomposite coatings depended strongly upon their hierarchical structure and the magnitude of compressive residual stresses in the nanocomposite coatings. (C) 2013 Elsevier B.V. All rights reserved.

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