α′-AlMnSi准晶近似相晶体结构研究  

Study on crystal structure of a novel quasicrystal approximantα′-AlMnSi

作　　者：范长增[1] 夏铮 李豪 刘一博 张硕 温斌[1] 张立峰 FAN Changzeng;XIA Zheng;LI Hao;LIU Yibo;ZHANG Shuo;WEN Bin;ZHANG Lifeng(State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao,Hebei 066004,China;Western Energy Material Technologies Co.Ltd.,Xi′an,Shaanxi 710016,China;School of Arts and Design,Yanshan University;School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,China)

机构地区：[1]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004 [2]西安西部新锆科技股份有限公司,陕西西安710016 [3]燕山大学艺术与设计学院,河北秦皇岛066004 [4]北方工业大学机械与材料工程学院,北京100144

出　　处：《燕山大学学报》2024年第3期204-214,共11页Journal of Yanshan University

基　　金：国家自然科学基金资助项目(52173231,51925105);河北省自然科学基金资助项目(E2022203182)。

摘　　要：利用单晶X射线衍射并与装配能量色散X射线能谱的扫描电镜相结合对化学计量比为74:20:6的Al粉、Mn粉与Si粉的放电等离子烧结析出物进行表征,发现了一种空间群为Im3^(-)的新型立方准晶近似相α′-AlMnSi。新相与约60年前报道的具有Pm3^(-)空间群的简单立方相α-AlMnSi原子占位略有不同,尽管两者具有相近的晶格参数。通过与α-AlMnSi、α-AlFeSi和α-AlReSi精细晶体结构模型的比较,发现α-AlMnSi(Pm3^(-))到α′-AlMnSi(Im3^(-))的转变主要是Al原子的劈裂导致。最后用纳米团簇法分析了α′-AlMnSi相的拓扑构建单元。A new cubic quasicrystal approximant phaseα′-AlMnSi,with space group3^(-)was discovered from the educts obtained by spark plasma sintering of mixed Al,Mn and Si in the stoichiometric ratio 74∶20∶6 and determined by mainly by single-crystal X-ray diffraction combined with scanning electron microscope equipped with energy dispersive X-ray spectroscopy.The new phase is different from the previously reported primitive cubic phaseα-AlMnSi with space group3^(-)although they have quite similar lattice parameters.The refined structural model of the new phase has been compared with available refined crystal structure models ofα-AlMnSi,α-AlFeSi as well asα-AlReSi,which suggest that the transformation between theα-AlMnSi3^(-)to the3^(-)is dominated by the splitting of Al atoms.Finally,the topological building units of theα′-AlMnSi phase has been analyzed in detail by the nanocluster method.

关 键 词：金属间化合物 α′-AlMnSi 晶体结构 无序 单晶X射线衍射 

分 类 号：TG145[一般工业技术—材料科学与工程]