| abstract |
(57) [Problem] To provide a ceramic composite material having a bending strength of 700 MPa or more at a temperature of 1700 ° C. SOLUTION: A) aluminum oxide, B) composite oxide of aluminum oxide and rare earth metal oxide, or composite oxide of aluminum oxide, rare earth metal oxide and zirconium oxide, C) zirconium oxide or oxidation It is a melt-solidified body composed of three oxide crystal phases of a composite oxide of zirconium and a rare earth metal oxide, and has a chemical composition of 55 to 80 mol% as aluminum oxide, rare earth metal oxide and zirconium oxide, respectively. , 10 A ceramic composite material in the range of 35 mol% and 10-35 mol%. |