材料科学
三元运算
透射电子显微镜
微量分析
结晶学
降水
壳体(结构)
相(物质)
电子显微镜
分析化学(期刊)
冶金
复合材料
纳米技术
化学
光学
物理
气象学
有机化学
色谱法
程序设计语言
计算机科学
作者
A. Tolley,Velimir Radmilović,U. Dahmen
标识
DOI:10.1016/j.scriptamat.2004.11.021
摘要
An unusual precipitate structure in ternary Al(Sc,Zr) alloys has been revealed by analytical and high resolution transmission electron microscopy. Coherent precipitates with L12 structure and highly anisotropic shapes were found to consist of a core containing Al and Sc surrounded by a Zr-rich shell. The shell thickness ranged from about 4 to 7 nm in different particles. An abrupt change in composition between core and shell was indicated by both, energy-dispersive X-ray microanalysis and high resolution phase contrast imaging. It is likely that this phenomenon is responsible for the increased resistance to coarsening of Al3(Sc,Zr) precipitates in these ternary alloys.
科研通智能强力驱动
Strongly Powered by AbleSci AI