Preparation of TiAl-Cr surface alloy by plasma-surface alloying technique

被引：19

作者：

He, Z. Y. ^{[1
]}

Wang, Z. X. ^{[1
]}

Liu, X. P. ^{[1
]}

Han, P. D. ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Res Inst Surface Engn, Taiyuan 030024, Shanxi, Peoples R China

来源：

VACUUM | 2013年 / 89卷

关键词：

TiAl alloy; Plasma surface alloying; First principle calculation; GAMMA-TITANIUM ALUMINIDES; OXIDATION BEHAVIOR; COATINGS; RESISTANCE; ADDITIVES;

D O I：

10.1016/j.vacuum.2012.07.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A plasma-surface technique was used to form a TiAl-Cr alloy on the surface of a TiAl-based alloy. The feasibility of the alloying process was evaluated by a first principle calculation method. The preparation process was optimized by investigating the effects of processing temperature and discharge pressure on the formation of surface alloy. The calculation using the first-principle method showed that the addition of Cr into the TiAl lattice would increase the stability of the system, and improve mechanical properties of the alloy. The processing temperature was selected at 1100 degrees C, slightly below the eutectic temperature of the Ti-Al system, ensuring diffusion efficiency and also avoiding the degradation of substrate microstructure. The optimum discharge pressure was 25 Pa within the range of 12-55 Pa. Sputtering and diffusion were well coordinated at this pressure and the obtained alloyed layer had the largest thickness. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：280 / 284

页数：5

共 16 条

[1] Preparation and high temperature oxidation behavior of refractory disilicide coatings for γ-TiAl intermetallic compounds [J].

Abu Suilik, Saleh B. ;

Takeshita, Ken ;

Kitagawa, Hiroyuki ;

Tetsui, Toshimitsu ;

Hasezaki, Kazuhiro .

INTERMETALLICS, 2007, 15 (08) :1084-1090

[2] Oxidation behavior of γ-TiAl based alloy with Al2O3-Y2O3 composite coatings prepared by electrophoretic deposition [J].

Gao, J. ;

He, Y. ;

Gao, W. .

SURFACE & COATINGS TECHNOLOGY, 2011, 205 (19) :4453-4458

[3] Oxidation resistance of TiAl alloy treated by plasma Nb-C alloying [J].

Guo, Chaoli ;

Liu, Xiaoping ;

Ben, Haifeng ;

He, Zhiyong .

SURFACE & COATINGS TECHNOLOGY, 2008, 202 (09) :1797-1801

[4] Surface modification of titanium alloy Ti6Al4V by plasma niobium alloying process [J].

He, Zhiyong ;

Wang, Zhenxia ;

Wang, Wenbo ;

Fan, Ailan ;

Xu, Zhong .

SURFACE & COATINGS TECHNOLOGY, 2007, 201 (9-11) :5705-5709

[5]

KIM YW, 1994, JOM-J MIN MET MAT S, V46, P30, DOI 10.1007/BF03220745

[6] PROGRESS IN THE UNDERSTANDING OF GAMMA TITANIUM ALUMINIDES [J].

KIM, YW ;

DIMIDUK, DM .

JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 1991, 43 (08) :40-47

[7] SPUTTERING YIELDS OF METALS FOR AR+ AND NE+ IONS WITH ENERGIES FROM 50 TO 600 EV [J].

LAEGREID, N ;

WEHNER, GK .

JOURNAL OF APPLIED PHYSICS, 1961, 32 (03) :365-&

[8] Aluminizing of TiAl-based alloy using thermal spray coating [J].

Sasaki, Tomohiro ;

Yagi, Takahiro ;

Watanabe, Takehiko ;

Yanagisawa, Atsushi .

SURFACE & COATINGS TECHNOLOGY, 2011, 205 (13-14) :3900-3904

[9] The effect of various ternary additives on the oxidation behavior of TiAl in high-temperature air [J].

Shida, Y ;

Anada, H .

OXIDATION OF METALS, 1996, 45 (1-2) :197-219

[10]

Sinheiser L, 2003, METALL MATER TRANS A, V34, P2247

← 1 2 →