Titanium with controllable pore fractions by thermo reversible gelcasting of TiH2

被引：80

作者：

Erk, Kendra A. ^{[1
]}

Dunand, David C. ^{[1
]}

Shull, Kenneth R. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

来源：

ACTA MATERIALIA | 2008年 / 56卷 / 18期

基金：

美国国家科学基金会;

关键词：

Porous material; Powder processing; Titanium hydride; Foams; Mechanical properties;

D O I：

10.1016/j.actamat.2008.06.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermoreversible gelcasting, a near-net-shape processing technique, is demonstrated here for titanium. The gelcasting system is composed of TiH2 particles suspended in a triblock copolymer gel that behaves as a viscous liquid above 56 degrees C and an elastic solid at room temperature, a temperature-dependent transition that is fully reversible when solvent is present. Organic pyrolysis to remove the gel followed by vacuum sintering to density the Ti powders (produced by decomposition of the hydride) results in titanium with near full density and low contamination. Incorporation of polypropylene and poly(methyl methacrylate) space-holder particles into the gel results in titanium with controlled porosities up to 44 vol.% and with low contamination. These foams exhibit tailorable stiffness and strength, together with excellent compressive ductility and energy absorption. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：5147 / 5157

页数：11

共 59 条

[1]

Ashby M.F., 2000, METAL FOAMS DESIGN G

[2] Advanced TiAl6Nb7 bone screw implant fabricated by metal injection moulding [J].

Aust, E ;

Limberg, W ;

Gerling, R ;

Oger, B ;

Ebel, T .

ADVANCED ENGINEERING MATERIALS, 2006, 8 (05) :365-370

[3] Manufacture, characterisation and application of cellular metals and metal foams [J].

Banhart, J .

PROGRESS IN MATERIALS SCIENCE, 2001, 46 (06) :559-U3

[4] Temperature induced gelation of concentrated ceramic suspensions:: Rheological properties [J].

Bergström, L ;

Sjöström, E .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1999, 19 (12) :2117-2123

[5]

Bram M, 2000, ADV ENG MATER, V2, P196, DOI 10.1002/(SICI)1527-2648(200004)2:4<196::AID-ADEM196>3.0.CO

[6]

2-K

[7]

Brunette DM, 2001, TITANIUM MED MAT SCI

[8]

CHEN CC, 1981, TMS FALL M LOUISV KY, P3

[9] Fabrication of textured ferroelectric ceramics by magnetic alignment via gelcasting [J].

Chen, Weiwu ;

Kinemuchi, Yoshiaki ;

Tamura, Takuya ;

Miwa, Kenji ;

Watari, Koji .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2007, 27 (2-3) :655-661

[10] Directionally freeze-cast titanium foam with aligned, elongated pores [J].

Chino, Yasumasa ;

Dunand, David C. .

ACTA MATERIALIA, 2008, 56 (01) :105-113

← 1 2 3 4 5 6 →