COMPARATIVE RESEARCH ON THE STRUCTURE AND PROPERTIES OF ZrO<sub>2</sub>/20% Y<sub>2</sub>O<sub>3</sub> LAYERS OBTAINED WITH PLASMA SPRAY DEPOSITION METHOD
Abstract
Ceramics and ceramic materials are materials with promising technical applications and with relatively high characteristics in terms of mechanical strength, but at the same time very low properties due to the fragility and the cracks appearing in the cooling layer. The cracking resistance is important not only for the technical products which operates in the mechanical thermal loads domain but also for structural components, cracks of which fragility is unacceptable even in arbitrary tasks.In this paper its being revealed a new concept of TBC with an exfoliation prevention of the sprayed layer and it consists in an adherent layer of NiMoAl (90-5-5) sprayed through an electric arc and a top coat of ZrO<sub>2</sub>/20%Y<sub>2</sub>O<sub>3</sub>, deposited by atmospheric plasma spraying (APS) on specimens of Ni base superalloy, of which the aircraft turbine blades are made. There were made some attempts of spraying at different distances, namely: 100 mm respectively 110 mm. These samples had been then subjected to mechanical bending tests to observe adhesion to the substrate. Highlighting and interpretation of structural changes caused by the tests carried out have been made using modern methods of structural analysis
Event details
- Event
- TC15 Youth Symposium 2012
- Technical Committee
- TC15
- Place
- Brasov, ROMANIA
- Time
- 30 May 2012 - 2 June 2012