Synthesis of γ-TiAl by Reactive Spark Plasma Sintering of Cryomilled Ti and Al Powder Blend, Part I: Influence of Processing and Microstructural Evolution

被引：23

作者：

Sun, Yu ^{[1
]}

Kulkarni, Kaustubh ^{[2
]}

Sachdev, Anil K. ^{[3
]}

Lavernia, Enrique J. ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

[2] Gen Motors Global R&D, India Sci Lab, Bangalore 560066, Karnataka, India

[3] GM Global R&D Ctr, Chem Sci & Mat Syst Lab, Warren, MI USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2014年 / 45A卷 / 06期

基金：

美国国家科学基金会;

关键词：

PULSED DC CURRENT; NANOSTRUCTURED MATERIALS; INTERFACIAL REACTIONS; COMBUSTION SYNTHESIS; ELECTRIC-FIELD; DIFFUSION; TITANIUM; ALLOYS; GROWTH; ENERGY;

D O I：

10.1007/s11661-014-2215-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To provide insight into the influence of an electric field on the kinetics of diffusion, fully lamellar gamma-TiAl was processed by a rapid, two-stage, solid-state reactive sintering via spark plasma sintering (SPS) of a cryomilled Ti, Al powder blend. Cryomilling was implemented in the current study to attain a nanostructured grain size in the Ti and Al powder blend, and thereby provide insight into the influence of grain size on the underlying diffusion kinetics. Following a two-step process involving SPS at 873 K (600 A degrees C) for 15 minutes and 1523 K (1250 A degrees C) for 30 minutes, a fully lamellar TiAl alloy, with submicron lamellar spacing, was successfully obtained. Microstructural refinement in the Ti and Al powders during cryomilling led to an increase in solid-state diffusion, and the underlying mechanisms are discussed in detail.

引用

页码：2750 / 2758

页数：9

共 45 条

[1]

[Anonymous], 2003, HDB CHEM PHYS

[2] Fundamental investigations on the spark plasma sintering/synthesis process III. Current effect on reactivity [J].

Anselmi-Tamburini, U ;

Garay, JE ;

Munir, ZA .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 407 (1-2) :24-30

[3] Influence of stacking-fault energy on microstructural characteristics of ultrafine-grain copper and copper-zinc alloys [J].

Balogh, Levente ;

Ungar, Tamas ;

Zhao, Yonghao ;

Zhu, Y. T. ;

Horita, Zenji ;

Xu, Cheng ;

Langdon, Terence G. .

ACTA MATERIALIA, 2008, 56 (04) :809-820

[4] MECHANISM OF MECHANICAL ALLOYING [J].

BENJAMIN, JS ;

VOLIN, TE .

METALLURGICAL TRANSACTIONS, 1974, 5 (08) :1929-1934

[5] Ignition mechanism in combustion synthesis of Ti-Al and Ti-Ni systems [J].

Bertolino, N ;

Monagheddu, M ;

Tacca, A ;

Giuliani, P ;

Zanotti, C ;

Tamburini, UA .

INTERMETALLICS, 2003, 11 (01) :41-49

[6] High-flux current effects in interfacial reactions in Au-Al multilayers [J].

Bertolino, N ;

Garay, J ;

Anselmi-Tamburini, U ;

Munir, ZA .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 2002, 82 (08) :969-985

[7] Titanium aluminide sheets made using roll bonding and reaction annealing [J].

Chaudhari, Gajanan P. ;

Acoff, Viola L. .

INTERMETALLICS, 2010, 18 (04) :472-478

[8] Effect of spark plasma sintering temperature on microstructure and mechanical properties of an ultrafine grained TiAl intermetallic alloy [J].

Chen, Y. Y. ;

Yu, H. B. ;

Zhang, D. L. ;

Chai, L. H. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 525 (1-2) :166-173

[9]

Clemens H, 2000, ADV ENG MATER, V2, P551, DOI 10.1002/1527-2648(200009)2:9<551::AID-ADEM551>3.0.CO

[10]

2-U

← 1 2 3 4 5 →