Structural and mechanical properties of nanostructured metalloceramic coatings on cobalt chrome alloys
Structural and mechanical properties of nanostructured metalloceramic coatings on cobalt chrome alloys
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DOI：
10.1063/1.1560862
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发表时间：
2003-03
影响因子：
4
通讯作者：
S. Catledge;Y. Vohra;S. Woodard;R. Venugopalan
中科院分区：
文献类型：
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作者：
S. Catledge;Y. Vohra;S. Woodard;R. Venugopalan
采用薄膜X射线衍射（XRD）、纳米压痕和划痕附着力测试研究了钴铬合金表面纳米功能梯度陶瓷涂层。从金属键合到主要共价键合的逐渐过渡以及纳米晶晶粒结构提供了具有优异强度、韧性和粘合性能的独特材料系统。（CrTiN）涂层的XRD分析表明具有a=4.2169±0.0035 A的立方氯化钠相结构。涂层的纳米压痕测量结果为27 GPa的硬度和320 GPa的杨氏模量。具有高塑性的涂层的分级金属/共价性质还导致优异的膜/基材粘附性，如划痕测试中44±5 N的平均临界力所示。
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.