Abstract
The fine powder of β -SIC (50 mass%) and 50 mass% of oxide powders, 2 mole of Yb2O3 and 1 mole of Al2O3, were mixed and sintered at 1825°C in N2 gas. A dense composite can be obtained. The composite is constituted of β-SIC and Yb4Al2O9 mainly. It is not clear whether the Yb4Al2O9 matrix makes a martensitic transformation. The strength is more than 500 MPa. The thermal expansion coefficient is 6.1×10-6/°C.
