Thermo-Mechanical Behaviour of HfO2 Coatings for Aerospace Applications

K. Mergia; Volker Liedtke; T. Speliotis; G. Apostolopoulos; S. Messoloras

doi:10.4028/www.scientific.net/AMR.59.87

Paper Titles

Micro-Raman Study on Structure Evolution of Graphite Exposed to Intense Thermal Shock Load
p.66

Features of Technological Layout of Manufacture of Unique Mono-Block Large-Dimension Plates
p.71

Al Si Oxide Coating as Ttritium Penetration Barrier on 316L Stainless Steel Prepared by a Combined Process
p.76

Methods of Increasing Thermal Conductivity of Plasma Sprayed Tungsten-Based Coatings
p.82

Thermo-Mechanical Behaviour of HfO₂ Coatings for Aerospace Applications
p.87

Examinations on the Oxidation Resistance of Innovative Carbon Based Materials
p.92

Investigation of the Possibility of Application of Boron Clusters in Composite Materials with Metal Matrix
p.96

Impact Bending Tests on Selected Refractory Materials
p.101

Improved Mechanical Properties of Ti₂AlNb-Based Intermetallic Alloys and Composites
p.105

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 59Thermo-Mechanical Behaviour of HfO2 Coatings for...

Thermo-Mechanical Behaviour of HfO₂ Coatings for Aerospace Applications

Abstract:

The use of ceramic composite materials in aerospace applications requires the development of oxidization protection coatings which can withstand very high temperatures. HfO2 is a promising material as a high temperature oxidization protective layer. HfO2 coatings have been deposited by radiation frequency magnetron sputtering all over the surface of SiC substrates and were tested under re-entry conditions. Also their oxidization resistance in air in the temperature range 1100 to 1450°C has been examined. The coatings were found to be stable and well-adhering to the substrate even after 100 re-entry cycles. No oxidization of the underlying SiC structure is observed. Re-entry and oxidization tests result in the formation of HfSiO4 at the HfO2/SiC interface, which further promotes their oxidization resistance.

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