Al-Cu-Cr非稳定准晶及其类似相的断裂韧性  

Fracture Toughness of Al-Cu-Cr Quasicrystals and its Approximents

作　　者：齐育红[1] 张占平[1] 刘德良[1] 黑祖昆[1] 马永庆[1] 

机构地区：[1]大连海事大学机电与材料工程学院,辽宁大连116026

出　　处：《材料科学与工程学报》2006年第3期370-373,共4页Journal of Materials Science and Engineering

基　　金：国家自然科学基金委员会"面上项目基金"资助项目(60071010)

摘　　要：用雾化法制得的Al65Cu20Cr15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1.07 MPa.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。Fracture toughness of Al-Cu-Cr quasicrystalline materials was evaluated by testing the Al-Cu-Cr icosahedral quasicrystalline particles and decagonal quasicrystalline particles in the Al-Cu-Cr qusicrystals/Al composites synthesized by hot-pressing and heat-treated using Vickers microindentation technique. The results show that fracture toughness of Al-Cu-Cr icosahedral quasicrystals in the hot-pressed composites was evaluated to be about 0.82 MPa·m^1/2 which is little lower than that of Al-Cu-Cr decagonal quasicrystals in the annealed composites, about 1.07 MPa·m^1/2. No obvious change of fracture toughness of Al-Cu-Cr decagonal quasicrystals in the quenched and annealed composites was found.

关 键 词：Al-Cu—Cr准晶 断裂韧性 压痕法 

分 类 号：TG146.21[一般工业技术—材料科学与工程]