The influence of zirconium carbide addition on oxidation behaviour of NiAl coatings prepared by cold spraying of ball-milled Ni–Al alloy powder. (1st September 2013)

• Record Type: Journal Article
• Authors: Xie, R; Li, D; Yang, G; Li, C
• Is Part Of: Materials science and technology. Volume 29:Number 9(2013:Sep.)
• Page Start: 1125
• Page End: 1129
• Publication Date: 2013-09-01
• Subjects: NiAl, -- ZrC, -- Cold spraying, -- Oxidation; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1179/1743284713Y.0000000289
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : The microstructure and oxidation behaviour of NiAl and NiAl/ZrC coatings prepared by cold spraying of ball-milled Ni/Al alloy powders were investigated. The microstructure of the mechanically alloying Ni/Al powder and NiAl coating was characterised by scanning electron microscopy and X-ray diffraction analysis. The results show that the homogeneity of the microstructure of ball-milled Ni/Al composite powder was modified by the addition of fine ZrC particles. The microstructure of the cold sprayed NiAl/ZrC coatings was denser than that of the NiAl coatings without the addition of ZrC particles. α -Al2 O3 oxide scales were formed on the surface of both NiAl coating and NiAl/ZrC coatings during oxidation at 1050°C. After NiAl with ZrC addition was oxidised at 1130°C for 50 h, the α -Al2 O3 scale was less than 5 μm, which exhibited excellent oxidation resistance.