(河北工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，天津 300130)
摘 要: 利用X射線衍射儀、 透射電鏡、 掃描電鏡、 原子力顯微鏡等研究了Cu-18Al-9Mn-3.4Zn(摩爾分?jǐn)?shù)， %)形狀記憶合金的馬氏體晶體結(jié)構(gòu)、 亞結(jié)構(gòu)以及馬氏體相變宏觀形狀應(yīng)變特征。 結(jié)果表明： 該合金的馬氏體晶體結(jié)構(gòu)為18R結(jié)構(gòu)， 亞結(jié)構(gòu)為層錯； 單變體馬氏體表面浮凸呈 “ ”型， 浮凸高度為400～500 nm ， 浮凸寬度為2 000～2 400 nm； 多變體馬氏體表面浮凸呈“N”型和“山尖”型， 浮凸高度為200～400 nm， 浮凸寬度為1 000～1 800 nm； 浮凸角均為8°~12°； 馬氏體相變符合G-T模型的雙切變特征， 慣習(xí)面為(113)面。
關(guān)鍵字: 原子力顯微鏡; 表面浮凸; 浮凸角; G-T模型; 慣習(xí)面
（ School of Materials Science and Engineering,
Hebei University of Technology,Tianjin 300130, China）
Abstract: crystal structure, substructure and macroscopic lattice deformation of martensite in Cu-18Al-9Mn-3.4Zn(mole fraction, %) were studied by means of X-ray, TEM, SEM and AFM. The results show that the tested alloy has 18R structure and stacking fault substructure. “ ”-shape surface relief is found in single variants. The height of single relief is 400-500 nm and the width is 2 000-2 400 nm; Meanwhile, “N”-shape and “hill”-shape surface relief are found in various variants. The high of these relief is 200-400 nm and the width is 1 000-1 800 nm. The relief angle is 8°-12° both in single and various variant. Martensite transformation according with the character of double-shear in G-T modal and (113) habit planes was testified.
Key words: AFM; surface relief; relief angle; G-T modal; habit plane
