Spray process for in situ synthesizing Ti(C,N)-TiB2-Al2O3 composite ceramic coatings

1st International Conference on Frontiers of Materials Synthesis and Processing

材料科学;化学

Zhou, Jian^1 ; Liu, Hongwei^1 ; Sun, Sihao^2

National Key Laboratory of Science and Technology On Remanufacturing, Armored Forces College, Beijing

100072, China^1

Military Representative Bureau of Army in Nanjing, Fuzhou, Fujian

350000, China^2

关键词: Composite ceramic coating;    Comprehensive performance;    Evaluation standard;    Porosity of coatings;    Spray distances;    Spray parameters;    Strip materials;    Uniform distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/274/1/012035/pdf
DOI  :  10.1088/1757-899X/274/1/012035

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Using core wires with Ti-B4C-C as core and Al as strip materials, Ti(C,N)-TiB2-Al2O3 composite ceramic coatings were prepared on 45 steel substrates by the reactive arc spray technology. The influence of spray voltage, current, gas pressure and distance on the coatings was discussed. The spray parameters were optimized with porosity of the coatings as evaluation standard. The results showed that the most important factor which influences the quality of the coatings was spray distance. Then spray gas pressure, current and voltage followed in turn. The optimum process was spray current of 120A, voltage of 36, gas pressure of 0.7MPa and distance of 160mm. The porosity of coatings prepared in this spray process was only 2.11%. The coatings were composed of TiB2, TiC0.3N0.7, TiN, Al2O3 and AlN. Good properties and uniform distribution of these ceramic phases made the coatings have excellent comprehensive performances.