作　　者： ; ; ; ;

机构地区： 哈尔滨工业大学材料科学与工程学院

出　　处： 《金属学报》 2003年第4期355-358,共4页

摘　　要： 以Hf和Ti作为替换元素对Zr_(60)Cu_(20)Ni_(10)Al_(10)非晶合金进行了掺杂(替换法)研究,结果表明,掺杂元素含量有一最佳范围,其中,Ti的最佳含量约为2％(原子分数)左右,而Hf的最佳含量为3％,在最佳含量时二者都具有明显的扩大合金过冷温度区间△T_x的作用,超过最佳掺杂量,会使非晶相变得不稳定,促进某些晶化相的形成,从而降低△T_x,当采用Hf和Ti两种元素的最佳含量联合掺杂时,稳定非晶相的作用更加明显,并且△T_x提高的幅度大于两种元素单独掺杂时的效果,△T_x最大(144℃)的成分为:Zr_(60)Cu_(20)Ni_8Al_7Hf_3Ti_2,该合金T_g=357℃,Tx=501℃,T_(rg)=0.59。 Effects of Hf and Ti additions on the glass forming ability (GFA) of bulk amorphous Zr60Cu20Ni10Al10 alloy have been investigated. The results show that both Hf and Ti have the role of enlarging the supercooled liquid region △Tx when the adding amount is around 1%-3% (atomic fraction), but △Tx of the alloy will decrease greatly resulting from the earlier precipitation of some unstable intermetallics when the adding amount exceeds 3%. When Hf and Ti with a suitable amount were added together in the Zr60Cu20Ni10Al10 alloy, △Tx will be increased to a larger extent than separately adding of Ti and Hf. A promising composition with high GFA was experimentally determined to be Zr60Cu20Ni8Al7Hf3Ti2 which has characteristic parameters of Tg=357 ℃, Tx=501CCCCC, △Tx= 144℃, Trg=0.59.

关 键 词： 锆基块体非晶合金 过冷液相区 玻璃形成能力 掺杂

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺] [金属学及工艺] [一般工业技术] [金属学及工艺]