용융침투법으로 제조한 알루미나-유리 복합체의 동적 피로 특성 평가 = Evalution on the Properties of the Dynamic Fatigue of Alumina-Glass Composites by Melt-Infiltration Processes

다국어 초록 (Multilingual Abstract)

The fatigue characteristics of alumina-glass composites were evaluated by biaxial flexure test under the dynamic loading conditions. 88 specimens were tested by tested by testing 22 samples at each of four loading rates : 0.01, 0.1, 1, and mm/min. A Vickers-produced indentation crack was made at the center of the tensile surface with load of 49.0 N, and the microstructural aspects of crack propagation was investigated under statically loaded state in distilled water at 37℃.
The results obtained were summarized as follows;
1. The fatigue parameter of alumina-glass composite containing 6 mol % yttria was n=22.2, σf0=319.6 MPa.
2. 10-year failure stress of alumina-glass composite containing 6 mol% yttria was 171.7 MPa.
3. Fracture surface of alumina-glass composite indicated the frictional interlocking of jogs having the tendency of toughening by crack deflection, rather than by crack bridging.