用雾化法制得的Al65 Cu20 Cr15准晶粉末与纯铝热压合成复合材料,在热压和热处理状态下复合材料中的颗粒为尺寸在35-160μm范围的Al-Cu-Cr二十面体准晶和十次准晶及其类似相.采用维氏压痕实验技术测试估算了Al-Cu-Cr准晶颗粒的断裂韧性.结果表明,热压状态下的Al-Cu-Cr二十面体准晶材料的断裂韧性约为0.82MPa·m1/2,经退火处理后得到的Al-Cu-Cr十次准晶及其类似相材料的断裂韧性约为1.07MPa·m1/2,与Al-Cu-Cr二十面体准晶材料相比有所提高.在退火和淬火两种状态下Al-Cu-Cr十次准晶及其类似相材料的断裂韧性无明显变化.
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