Microstructures and mechanical properties of ZrO2/NiAl matrix composites elaborated from mechanofusion-processed powders

• Published in: Journal of materials science Vol. 38; no. 3; pp. 589 - 595
• Main Authors: OUCHETTO, M, GROSBRAS, M, CHOUIYAKH, A
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.02.2003; Springer Nature B.V
• Subjects: Applied sciences; Composite materials; Elasticity. Plasticity; Exact sciences and technology; Intermetallic compounds; Materials science; Mechanical properties; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Mechanical tests; Metal powders; Metals. Metallurgy; Morphology; Nickel aluminides; Nickel base alloys; Nickel compounds; Powder metallurgy. Composite materials; Production techniques; Zirconium dioxide; Particle size; Vickers hardness; Hot isostatic pressing; Aluminium alloy; Experimental study; Coatings; Mechanical alloying; Composite material; Inorganic compound; Zirconium oxide; Transition metal compounds; Transition metal alloy; Powder compaction; Yield strength; Microstructure; Nickel alloy; Strength
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1023/A:1021862212556

ZrO2-coated NiAl powders have been elaborated using an innovative mill process, the so-called mechanofusion process. Following processing conditions, different types of particles (size, morphology, degree of coating) can be obtained. These powders were consolidated to full density by HIPping and mechanical tests were carried out on the various elaborated products at temperatures ranging between 20–800°C. Results are compared to those previously obtained for ZrO2/NiAl composites elaborated by conventional methods. It is shown that mechanical strength of ZrO2/NiAl composites can be considerably improved by using the mechanofusion process.