Influence of process parameters on the formation of phases and mechanical properties of plasma sprayed Al2O3–Cr2O3 coatings

被引：10

作者：

Dhakar B. ^{[1
]}

Chatterjee S. ^{[1
]}

Sabiruddin K. ^{[1
]}

机构：

[1] Discipline of Mechanical Engineering, Indian Institute of Technology Indore, Indore

来源：

Materials Research Innovations | 2017年 / 21卷 / 06期

关键词：

Al[!sub]2[!/sub]O[!sub]3[!/sub]–Cr[!sub]2[!/sub]O[!sub]3[!/sub; hydrogen flow rate; plasma spraying; Rietveld; XRD;

D O I：

10.1080/14328917.2016.1265246

中图分类号：

学科分类号：

摘要：

Atmospheric plasma spray process is used to develop Al2O3–Cr2O3 composite coating on AISI 1020 steel substrate by spraying mechanically mixed Al2O3–Cr2O3 feedstock material. The influence of hydrogen gas flow rate on the formation of α-Al2O3 phase in the coating is studied. Effect of changing hydrogen flow rate on the mechanical properties (hardness, wear resistance, porosity and surface roughness) of the coating is also judged. Scanning electron micrograph and X-ray diffraction analyses of the coating are carried out for studying the micro-structure and phases, respectively. Rietveld refinement technique is used to quantify the different phases present in the coating. From the results, it is found that α-Al2O3 phase content in the Al2O3–Cr2O3 coating is decreased with increase in hydrogen gas flow rate. The reduction in α-Al2O3 phase content by the increase in hydrogen flow rate is mainly due to the rise in enthalpy of plasma, causing improvement in the melting of the Al2O3 particles. © 2016 Informa UK Limited, trading as Taylor & Francis Group.

引用

页码：367 / 376

页数：9

共 36 条

[1]

McPherson R., On the formation of thermally sprayed alumina coatings, J Mat Sci, 15, pp. 3141-3149, (1980)

[2]

Dubsky J., Chraska P., Kolman B., Et al., Phase formation control in plasma sprayed alumina-chromia coatings, Ceram Silik, 55, pp. 294-300, (2011)

[3]

Stahr C.C., Saaro S., Berger L.M., Et al., Dependence of the stabilization of α-alumina on the spray process, J Therm Spray Technol, 16, pp. 822-830, (2007)

[4]

Dudina D.V., Batraev I.S., Ulianitsky V.Y., Et al., Detonation spraying of Ti-Al Intermetallics: phase and microstructure development of the coatings, Mater Manuf Process, 30, pp. 724-729, (2015)

[5]

Suffner J., Sieger H., Hahn H., Et al., Microstructure, mechanical properties of near-eutectic ZrO2-60wt-%Al2O3 produced by quenched plasma spraying, Mater Sci Eng A, 507, pp. 180-186, (2009)

[6]

Sunil J.R., Keshavamurthy R., Prakash C.P.S., Et al., Optimization of process parameters for plasma sprayed flyash-titania composite coatings, Mater Today: Proceed, 2, 4-5, pp. 2482-2490, (2015)

[7]

Yang J., Zhao X., An Y., Et al., Effect of processing parameters on properties of plasma sprayed CuAl coating, Mater Manuf Process, 29, pp. 1126-1130, (2014)

[8]

Sabiruddin K., Joardar J., Bandyopadhyay P.P., Analysis of phase transformation in plasma sprayed alumina coatings using Rietveld refinement, Surf Coat Technol, 204, pp. 3248-3253, (2010)

[9]

Pei W., Zhengying W., Guangxi Z., Et al., The analysis of melting and refining process for in-flight particles in supersonic plasma spraying’, Comput Mater Sci, 103, pp. 8-19, (2015)

[10]

Wu Z., Empirical modeling for processing parameters’ effects on coating properties in plasma spraying process, J Manuf Process, 19, pp. 1-13, (2015)

← 1 2 3 4 →