3D ATOM PROBE CHARACTERIZATION OF MICRO-STRUCTURE OF TiBx/Al SUPERSATURATED SOLID SOLUTE COMPOSITE FILMS

doi:10.3724/SP.J.1037.2013.00447

Acta Metall Sin

2014, Vol. 50

Issue (4): 395-399 DOI: 10.3724/SP.J.1037.2013.00447

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3D ATOM PROBE CHARACTERIZATION OF MICRO-STRUCTURE OF TiB_x/Al SUPERSATURATED SOLID SOLUTE COMPOSITE FILMS

SHANG Hailong¹, LIU Wenqing², DONG Yujun¹, ZHANG Anming¹, MA Bingyang^sup1, 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

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SHANG Hailong, LIU Wenqing, DONG Yujun, ZHANG Anming, MA Bingyang, LI Geyang. 3D ATOM PROBE CHARACTERIZATION OF MICRO-STRUCTURE OF TiB_x/Al SUPERSATURATED SOLID SOLUTE COMPOSITE FILMS. Acta Metall Sin, 2014, 50(4): 395-399.

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Abstract

In order to reveal the solute existing form and its effect on the microstructure and mechanical properties in the supersaturated solid solute films, TiB_x/Al composite film with 7.1%TiB_x (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 TiB_x 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%TiB_x) 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 words: aluminum matrix nanocomposite film supersaturated solid solution magnetron sputtering 3D atom probe

Received: 29 July 2013

ZTFLH:	TG146.2
	TG174.444

Fund: Supported by National Basic Research Program of China (No.2012CB619601) and National Natural Science Foundation of China (No.51071104 )

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	Hailong SHANG
	Wenqing LIU
	Yujun DONG
	Anming ZHANG
	Bingyang MA
	Geyang LI

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2013.00447 OR https://www.ams.org.cn/EN/Y2014/V50/I4/395

Fig.1

TiB_x/Al复合薄膜的XRD谱

Fig.2

TiB_x/Al复合薄膜的TEM像和SAED谱

Fig.3

利用3DAP分析的Al, Ti和B原子在TiB_x/Al复合薄膜中的分布

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