Mechanical behaviour of pressed and sintered CP Ti and Ti-6Al-7Nb alloy obtained from master alloy addition powder

被引：34

作者：

Bolzoni, L. ^{[1
]}

Weissgaerber, T. ^{[2
]}

Kieback, B. ^{[2
]}

Ruiz-Navas, E. M. ^{[1
]}

Gordo, E. ^{[1
]}

机构：

[1] Univ Carlos III Madrid, Dept Ciencia & Ingn Mat & Ingn Quim, Leganes 28911, Madrid, Spain

[2] Fraunhofer Inst Mfg Technol & Adv Mat, Powder Met & Composite Mat Dresden, D-01277 Dresden, Germany

来源：

JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS | 2013年 / 20卷

关键词：

Ti-6Al-7Nb; Titanium powder metallurgy; Blending elemental (BE); Master alloy; Flexural properties; TITANIUM-ALUMINUM SYSTEM; MICROSTRUCTURAL EVOLUTION; INTERDIFFUSION; DIFFUSION;

D O I：

10.1016/j.jmbbm.2012.08.022

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The Ti-6Al-7Nb alloy was obtained using the blending elemental approach with a master alloy and elemental titanium powders. Both the elemental titanium and the Ti-6Al-7Nb powders were characterised using X-ray diffraction, differential thermal analysis and dilatometry. The powders were processed using the conventional powder metallurgy route that includes uniaxial pressing and sintering. The trend of the relative density with the sintering temperature and the microstructural evolution of the materials sintered at different temperatures were analysed using scanning electron microscopy and X-ray diffraction. A minimum sintering temperature of 1200 degrees C has to be used to ensure the homogenisation of the alloying elements and to obtain a pore structure composed of spherical pores. The sintered samples achieve relative density values that are typical for powder metallurgy titanium and no intermetallic phases were detected. Mechanical properties comparable to those specified for wrought Ti-6Al-7Nb medical devices are normally obtained. Therefore, the produced materials are promising candidates for load bearing applications as implant materials. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：149 / 161

页数：13

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