(1. 哈爾濱工業(yè)大學(xué) 金屬精密熱加工國防科技重點(diǎn)實(shí)驗(yàn)室，哈爾濱 150001；
2. 山東大學(xué)(南區(qū)) 材料液態(tài)結(jié)構(gòu)及其遺傳性教育部重點(diǎn)實(shí)驗(yàn)室， 濟(jì)南 250061)
摘 要: 為了研究液態(tài)Cu和Al的短程有序結(jié)構(gòu)， 建立了液態(tài)微觀結(jié)構(gòu)的納米晶粒模型。 根據(jù)這個(gè)模型，從晶體X射線衍射學(xué)的角度出發(fā)， 通過對(duì)一定晶格結(jié)構(gòu)的固態(tài)Cu和Al衍射峰進(jìn)行寬化處理， 計(jì)算出了它們的液態(tài)X射線衍射強(qiáng)度曲線。 結(jié)果表明， 這些強(qiáng)度曲線與實(shí)驗(yàn)獲得的液態(tài)Cu和Al的X射線衍射強(qiáng)度曲線具有較好的一致性， 這不僅證明了納米晶粒模型的正確性，同時(shí)也證明了Cu和Al的液態(tài)短程有序結(jié)構(gòu)分別是FCC和BCC。
關(guān)鍵字: 液態(tài)金屬； 微觀結(jié)構(gòu)； 納米晶粒模型； 短程有序
SUN Jian-fei1, LI Qing-chun1
（ 1. National Key Laboratory of Precision Hot Processing of Metals，
Harbin Institute of Technology,
Harbin 150001, China;
2. Key Laboratory of Liquid Structure and
Heredity of Materials,
Ministry of Education, Shandong University,
Ji′nan 250061, China）
Abstract: For investigating the structure of short range order(SRO) in Cu and Al melt, a nanocrystalline model for liquid metal was constructed. According to this model, the intensity curves of X-ray diffraction(XRD) of liquid Cu and Al were calculated with broadening XRD peaks of these metals in some crystal structure. The results show that these calculated intensity curves are identical with the results measured with liquid metal X-ray diffractometer on liquid Cu and Al. This fact proves that the nanocrystalline model is correct and that there is a high correlation between the SRO structures of these liquid metals and some crystalline structure, and the SRO structures of Cu and Al melt are FCC and BCC, respectively.
Key words: liquid metals; microstructure; nanocrystalline model; short range order
