无机材料学报2011，Vol.26Issue(10)：1063-1067,5.DOI:10.3724/SP.J.1077.2011.01063
轴向送粉等离子喷涂Ni/Al2O3涂层的力学及微波介电性能
Mechanical and Dielectric Properties of Ni/Al2O3 Composite Coatings Prepared by the Axial Plasma Spraying
摘要
Abstract
The nickel-alumina composite coatings were fabricated by the axial plasma spraying method. The effects of the different content of Ni on the microscopic structure, mechanical and dielectric properties of the composite coatings were investigated. The results indicate that with the increase of nickel content, the distribution of Ni particles changes from separated to large but finite interconnected clusters. The relative density and the bending strength decrease gradually, which is attributed to thermal expansion mismatch and non-wettability between alumina and nickel. The increase in the fracture toughness is caused by the Ni particles' extension and deflection of the crack. The complex dielectric constant measurements indicate that the real part shows an increase and then decline trend with the Ni content in the frequency of 8.2-12.4GHz, while the imaginary part continues increasing. This is ascribed to the bridge structure of Ni particles.关键词
Ni/Al2O3涂层/等离子喷涂/介电性能/力学性能Key words
coatings of Ni/Al2O3/ axial plasma spraying/ mechanical properties/ dielectric properties分类
通用工业技术引用本文复制引用
武志红,周万城,罗发,朱冬梅..轴向送粉等离子喷涂Ni/Al2O3涂层的力学及微波介电性能[J].无机材料学报,2011,26(10):1063-1067,5.基金项目
国家自然科学基金(51072165) （51072165）
凝固技术国家重点实验室(西北工业大学)自主研究项目(KP200901) （西北工业大学）
