チタン酸カリウムウィスカー強化AC8A合金複合材料の調整と機械的性質
1994 年 58 巻 1 号 p. 69-77
詳細
1994 年 58 巻 1 号 p. 69-77
An AC8A aluminum alloy matrix composite reinforced with highly crystallized potassium titanate whisker having a crystallite size of 76 nm was fabricated by squeeze casting. Heat hardening behavior and mechanical properties were examined on the obtained composites whose Mg contents in the matrix were from 0.7 to 1.9 mass%.
The Mg content and hardness of the composite were uniform at any locations. The composite whose Mg content in the matrix were 1.7 mass% solutionized at 803 K showed the highest strength value at room temperature and 573 K, respectively. And the Young’s modulus was as high as 138 GPa. The decrease in strength during exposure at up to 573 K was not observed. In particular, the properties of the obtained composite were found to be useful for the elevated temperature materials.
