Structural and mechanical properties of nanostructured metalloceramic coatings on cobalt chrome alloys

被引:10
作者
Catledge, SA [1 ]
Vohra, YK
Woodard, S
Venugopalan, R
机构
[1] Univ Alabama Birmingham, Dept Phys, Birmingham, AL 35294 USA
[2] Univ Alabama Birmingham, Dept Biomed Engn, Birmingham, AL 35294 USA
关键词
D O I
10.1063/1.1560862
中图分类号
O59 [应用物理学];
学科分类号
摘要
A functionally graded nanocrystalline metalloceramic coating on cobalt-chrome alloys was investigated with thin-film x-ray diffraction (XRD), nanoindentation, and scratch adhesion testing. The gradual transition in bonding from metallic to predominantly covalent along with a nanocrystalline grain structure provides a unique material system with excellent strength, toughness, and adhesion properties. XRD analysis of the (CrTiN) coating suggests a cubic sodium chloride phase structure with a=4.2169+/-0.0035 A. Nanoindentation measurements of the coating result in a hardness of 27 GPa and Young's modulus of 320 GPa. The graded metallic/covalent nature of the coating with high plasticity also results in excellent film/substrate adhesion as shown by an average critical force of 44+/-5 N in scratch testing. (C) 2003 American Institute of Physics.
引用
收藏
页码:1625 / 1627
页数:3
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