Platinum Ceramic Composites as new Electrode Materials: Fabrication, Sintering, Microstructures and Properties

• Published in: Advanced engineering materials Vol. 8; no. 1-2; pp. 81 - 88
• Main Authors: Rager, J., Nagel, A., Schwenger, M., Flaig, A., Schneider, G., Mücklich, F.
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.02.2006; WILEY‐VCH Verlag; Wiley-VCH
• Subjects: Applied sciences; Ceramic composites; Contact of materials. Friction. Wear; Dispersion hardening metals; Exact sciences and technology; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metal matrix composites; Metals. Metallurgy; ODS materials; Powder metallurgy. Composite materials; Production techniques; Particle size; Vickers hardness; Metal matrix composite; Magnesium oxide; Electrode material; Cerium oxide; Composite material; Dispersion strengthened metal; Zirconium oxide; Abrasive wear; Platinum; Sintering; Wear; Wear resistance; Microstructure; Erosion
• ISSN: 1438-1656; 1527-2648
• DOI: 10.1002/adem.200500192

The economical application of precious metals as electrode materials is an important economic and ecological task. Different platinum composites with 14 vol.% ceramic dispersoids were fabricated. The sintering behaviour and microstructure development was studied in the temperature range between 1000°C and 1760°C. Significant differences were found with respect to the sintering activity and the particle size distribution. Spark erosion tests revealed that the erosion resistance of platinum is degraded by the addition of oxide particles. A new model is proposed to explain the observed erosion behaviour.