MoSi2 - matrix composites for combustion components exposed to high temperature oxidation and hot corrosion

Research Project, 2014 – 2018

The proposal aims at developing advanced MoSi2 matrix composites for hot corrosion components in a combustion chamber of gas turbine engines. The goal is to make composite materials having resistance to hot corrosion and thermal cycling in the combustion environment and moderate mechanical properties at 1200˚C. Two types of composites will be prepared in the project using powder metallurgy (PM) and pressure-less sintering (PLS) techniques: (1) pre-oxidization treated MoSi2–ZrO2 composite, and (2) pre-oxidized Mo(Si,Al)2–SiC composite. The materials will be investigated with cyclic oxidation (TCF) testing in air and isothermal exposure in H2-containing atmosphere at 1200˚C. The flexure strength will be tested at 1200˚C, and will be compared with that of conventional ceramic materials. The project is collaboration between Sandvik Heating Technology AB (SHT) and Chalmers University of Technology (CTH).