Phase transitions in Al₃Ca₈ and Al₁₄Ca₁₃ intermetallic compounds induced by milling and annealing

详细信息	查看全文 | 推荐本文 |

• 作者：A.K. Chaubey^a ; ^b ; ^c ; ^{a.k.chaubey@ifw-dresden.de} ; S. Scudino^a ; K.G. Prashanth^a ; M. Stoica^a ; G. Vaughan^d ; N.K. Mukhopadhyay^b ; B.K. Mishra^c ; J. Eckert^a ; ^e
• 关键词：Intermetallic alloys and compounds ; Nanocrystalline materials ; Crystal structure ; Phase transformation
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：15 July, 2012
• 卷：79
• 期：Complete
• 页码：145-147
• 文件大小：336 K

摘要

The phase transformations occurring in mechanically milled and annealed triclinic Al₃Ca₈ intermetallic compound have been studied. The Al₃Ca₈ phase transforms initially to the nanostructured monoclinic Al₁₄Ca₁₃ intermetallic during milling. The Al₁₄Ca₁₃ phase is metastable and transforms back to the Al₃Ca₈ compound during subsequent heating. The transformation starts at low temperature with the grain coarsening of the Al₁₄Ca₁₃ phase. At intermediate temperatures, the transformation from Al₁₄Ca₁₃ to Al₃Ca₈ occurs. The sequence is completed at high temperatures with the grain coarsening of the Al₃Ca₈ phase.