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金属学报  2014, Vol. 50 Issue (4): 395-399    DOI: 10.3724/SP.J.1037.2013.00447
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TiBx/Al超过饱和固溶复合薄膜微结构的三维原子探针研究*
尚海龙1, 刘文庆2, 董玉军1, 张安明1, 马冰洋1, 李戈扬1()
1 上海交通大学金属基复合材料国家重点实验室, 上海 200240
2 上海大学微结构重点实验室, 上海 201306
3D ATOM PROBE CHARACTERIZATION OF MICRO-STRUCTURE OF TiBx/Al SUPERSATURATED SOLID SOLUTE COMPOSITE FILMS
SHANG Hailong1, LIU Wenqing2, DONG Yujun1, ZHANG Anming1, MA Bingyangsup1, LI Geyang1()
1 State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240
2 Key Laboratory for Microstructure, Shanghai University, Shanghai 201306
引用本文:

尚海龙, 刘文庆, 董玉军, 张安明, 马冰洋, 李戈扬. TiBx/Al超过饱和固溶复合薄膜微结构的三维原子探针研究*[J]. 金属学报, 2014, 50(4): 395-399.
Hailong SHANG, Wenqing LIU, Yujun DONG, Anming ZHANG, Bingyang MA, Geyang LI. 3D ATOM PROBE CHARACTERIZATION OF MICRO-STRUCTURE OF TiBx/Al SUPERSATURATED SOLID SOLUTE COMPOSITE FILMS[J]. Acta Metall Sin, 2014, 50(4): 395-399.

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摘要: 

通过TiB2和Al共溅射方法制备了约7.1%TiBx (原子分数)的铝基复合薄膜, 采用三维原子探针并结合X射线衍射仪、透射电子显微镜和微力学探针表征了薄膜的微结构和力学性能. 结果表明, 在溅射粒子的高分散性和薄膜生长的非平衡性共同作用下, TiB2靶的溅射粒子以TiBx化合物的形式被超过饱和地固溶于Al的晶格中, Al固溶体晶粒细化为纳米晶并逐步非晶化, 薄膜形成了较低溶质含量(约2%TiBx)纳米晶弥散分布于高溶质含量非晶基体中的两相结构并获得高硬度.结合实验结果讨论了超过饱和固溶体薄膜微结构形成的热力学和动力学原因.

关键词 铝基复合薄膜过饱和固溶磁控溅射三维原子探针    
Abstract

In order to reveal the solute existing form and its effect on the microstructure and mechanical properties in the supersaturated solid solute films, TiBx/Al composite film with 7.1%TiBx (atomic fraction) was synthesized by magnetron co-sputtering using Al and TiB2 targets. The microstructure and mechanical properties of the film were characterized by 3D atom probe cambined with X-ray diffraction, transmission electron microscopy and nanoindentation. The results reveal that TiBx compounds were largely dissolved in the Al lattice due to atomic mixing and sufficiently low mobility of the atoms during growth. The film grain was refined to nanoscale and amorphous gradually result from the severe lattice distortion. The film consisted of a two-phase structure in which lower solute content (about 2%TiBx) nanocrystals dispersed in amorphous matrix with a higher solute content and gained high hardness. Combined with the experimental results, the microstructure formation of the composite films was discussed from thermodynamic and kinetic aspects. This study provided the direct experimental evidence of compound dissolved in highly supersaturated solid solution.

Key wordsaluminum matrix nanocomposite film    supersaturated solid solution    magnetron sputtering    3D atom probe
收稿日期: 2013-07-29     
ZTFLH:  TG146.2  
基金资助:* 国家重点基础研究发展计划项目2012CB619601和国家自然科学基金项目51071104资助
作者简介: null

尚海龙, 男, 1984年生, 博士生

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