Al-Cu-Fe准晶相的液相面与邻近晶体相液相面的交线投影图  

POLYTHERMAL PROJECTION OF PRIMARY Al-Cu-Fe ICOSAHEDRAL QUASICRYSTAL PHASE AND THE RELATED CRYSTAL PHASE

作　　者：赵东山[1] 瞿文榜[2] 王仁卉[2] 沈宁福[1] 石广新[1] 桂嘉年[2] 

机构地区：[1]郑州大学材料工程学院 [2]武汉大学物理系

出　　处：《金属学报》2004年第1期14-19,共6页Acta Metallurgica Sinica

基　　金：国家自然科学基金 19974030

摘　　要：采用金相(OM)、X射线衍射(XRD)、扫描电子显微术(SEM)和透射电子显微术(TEM)等方法,研究了在不同温度长时间保温后水淬的Al_(48-60)Cu_(33-50)Fe_(0-10)系列合金的凝固组织及相组成,结果表明,Gayle等报道的Alcu-Fe三元相图的单变量线(液相面交线)投影图中β相的液相面应当划分为β+φ两个区域,新增的四相反应为包共晶反应U_8∶L+β→IQc+φ,反应温度约为800℃,X射线能谱(EDXS)分析表明,Ni_2Al_3结构的φ相的成分范围是Al_(47.3-50.6)Cu_(45.4-48.1)Fe_(4.5-5.2),而其成分中心是Al_(47.9)Cu_(47.1)Fe_(5.0)。A series of Al-Cu-Fe alloys with compositions of Al48-60Cu33-50Fe0-10 was prepared and the phase constituents in these alloys quenched from various temperatures were identified by using XRD, SEM, EDXS and EBSD attached to SEM, and TEM (including HRTEM). Compared with the polythermal projection proposed by Gayle et al, a main amendment is to divide the previous P-region into beta + phi two regions. A new ternary reaction is the quasiperitectic at U-8 : L + beta --> IQC + phi. EDXS reveals that the composition of phi phase with Ni2Al3 structure is in Al47.3-50.6Cu45.4-48.1Fe4.5-5.2, and its center composition is Al47.9Cu47.1Fe5.0.

关 键 词：单变量线(液相面交线)投影图 凝固组织 二十面体准晶相 Ф相 

分 类 号：TG111.4[金属学及工艺—物理冶金] O753.3[金属学及工艺—金属学]