Disorder in M(n+1)AX(n) phases at the atomic scale
Wang, Chenxu; Yang, Tengfei; Tracy, Cameron L.; Lu, Chenyang; Zhang, Hui; Hu, Yong-Jie; Wang, Lumin; Qi, Liang; Gu, Lin; Huang, Qing; Zhang, Jie; Wang, Jingyang; Xue, Jianming; Ewing, Rodney C.; Wang, Yugang
AbstractAtomic disordering in materials alters their physical and chemical properties and can subsequently affect their performance. In complex ceramic materials, it is a challenge to understand the nature of structural disordering, due to the difficulty of direct, atomic-scale experimental observations. Here we report the direct imaging of ion irradiation-induced antisite defects in M(n+1)AX(n) phases using double CS-corrected scanning transmission electron microscopy and provide compelling evidence of order-to-disorder phase transformations, overturning the conventional view that irradiation causes phase decomposition to binary fccstructured Mn+1Xn. With the formation of uniformly distributed cation antisite defects and the rearrangement of X anions, disordered solid solution gamma-(M(n+1)A)X-n phases are formed at low ion fluences, followed by gradual transitions to solid solution fcc-structured (M(n+1)A)X-n phases. This study provides a comprehensive understanding of the order-to-disorder transformations in M(n+1)AX(n) phases and proposes a method for the synthesis of new solid solution (M(n+1)A)X-n phases by tailoring the disorder.
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WOS IDWOS:000458008700001
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
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Wang, Chenxu,Yang, Tengfei,Tracy, Cameron L.,et al. Disorder in M(n+1)AX(n) phases at the atomic scale[J]. NATURE COMMUNICATIONS,2019,10.
APA Wang, Chenxu.,Yang, Tengfei.,Tracy, Cameron L..,Lu, Chenyang.,Zhang, Hui.,...&Wang, Yugang.(2019).Disorder in M(n+1)AX(n) phases at the atomic scale.NATURE COMMUNICATIONS,10.
MLA Wang, Chenxu,et al."Disorder in M(n+1)AX(n) phases at the atomic scale".NATURE COMMUNICATIONS 10(2019).
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