HIGH-TEMPERATURE CHARACTERIZATION OF SELFREINFORCED Si3N4 WITH ADDITIVES Y2O3 AND La2O3
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition1998年第1期
论文作者：罗学涛
文章页码：1 - 6
摘 要：<正>High-temperature strength and fracturetoughness,oxidation behavior,and thermal shock of the SRSi3N4 with Y2O3 and La2O3 as complex additives are inves-tigated.The research results show that the strength does notdecrease until 1400℃;the fracture toughness,while,in-creases with temperature rising and presents peak value at1350℃.The oxidation behavior obeys parabolic law,andthe oxidation procedure is mainly controlled by diffusion of additive ions.The high oxidation resistance of this mate-rial is primary due to the presence of refractory Y3+andLa3+at intergrnular glass phase.The thermal shock exper-iments show that the damage of strength is far larger thanthat of fracture toughness.
罗学涛
摘 要：<正>High-temperature strength and fracturetoughness,oxidation behavior,and thermal shock of the SRSi3N4 with Y2O3 and La2O3 as complex additives are inves-tigated.The research results show that the strength does notdecrease until 1400℃;the fracture toughness,while,in-creases with temperature rising and presents peak value at1350℃.The oxidation behavior obeys parabolic law,andthe oxidation procedure is mainly controlled by diffusion of additive ions.The high oxidation resistance of this mate-rial is primary due to the presence of refractory Y3+andLa3+at intergrnular glass phase.The thermal shock exper-iments show that the damage of strength is far larger thanthat of fracture toughness.
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