Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41741

Title

Scratch testing of nanocrystalline alumina+titania+zirconia

Author(s)

Gold, M.;  Berndt, Christopher C.

Abstract

This work examines nanocrystalline thermal spray coatings prepared under several power and stand off distances. The coating material was nanocrystalline alumina + titania and zirconia (ATZ) powder mixture deposited using an air plasma spray process. The experimental design employs a full factorial method totaling four samples. The mechanical properties of four coatings were compared via scratch and hardness testing. The scratching process was monitored for transverse loads during the test and the variation in load monitored. The profiles of scratches were analyzed using white light interference profilometry and studied further via SEM. The results indicate that the microstructure reflected features observed in the scratch test. It was also shown that the scratch process and morphology depend on the normal load and spray process.

Publication type

Conference paper

Source

Proceedings of the 2nd International Thermal Spray Conference, 'Thermal spray 2001: new surfaces for a new millennium', Singapore, 28-30 May 2001 / Christopher C. Berndt, Khiam A. Khor and Erich F. Lugscheider (eds.), pp. 1105-1110

Publication year

2001

Keyword(s)

Alumina;  Data reduction;  Elastic moduli;  Fracture toughness;  Hardness;  Hardness testing;  Microstructure;  Morphology;  Nanostructured materials;  Porosity;  Prolifometry;  Scanning electron microscopy;  Scratch testing;  Sprayed coatings;  Thermal spray coatings;  Wear resistance

Publisher

ASM International

ISBN

9780871707376, 0871707373

Peer reviewed