抄録
The Al2O3 based ceramics having 25 vol% single addition of different carbides were prepared by hotpressing and their resistance to oxidation in air mainly at 1573-1773 K was intensively investigated. The ceramics containing SiC in powder or whisker form were found to have the highest resistance to oxidation among many ceramics prepared with a single addition of different carbides. It was revealed out that the scale of the above ceramics, containing mullite phases, had a very tight structure with few micro-pores. Discussion as for the reason why Al2O3-SiC system shows such a superior oxidation resistance has been given.
