Creating Aligned, Elongated Pores in Titanium Foams by Swaging of Preforms with Ductile Space-Holder
نویسنده
چکیده
[*] Dr. Y. Chino Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology Nagoya, 463-8560, Japan E-mail: [email protected] Prof. D. C. Dunand Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois, 60208, USA [**] This research was supported by the US National Science Foundation through grant DMR-0505772.
منابع مشابه
Porous Titanium by Electro-chemical Dissolution of Steel Space-holders
Among the various methods existing to fabricate porous titanium for structural or biomedical applications, the spaceholder approach is particularly useful as it allows a close control of pore size, shape and fraction. In this method, a blend of pure or alloyed titanium powders and space-holder materials are cold-pressed into a preform which is sintered in vacuum. During the early stage of sinte...
متن کاملMorphological analysis of pores in directionally freeze-cast titanium foams
Synchrotron x-ray tomography was performed on titanium foams with aligned, elongated pores, initially created by sintering directionally freeze-cast preforms using two different powder sizes. Three-dimensional reconstructions of the pore structures were analyzed morphologically using interface shape and interface normal distributions. A smaller powder size leads to more completely sintered tita...
متن کاملDirectionally freeze-cast titanium foam with aligned, elongated pores
Directional freeze-casting – a process used to create foams with elongated, aligned pores applied so far exclusively for ceramics – is demonstrated for titanium foams. An aqueous slurry of <45 lm titanium powders was directionally solidified, resulting in a powder preform consisting of elongated, aligned dendrites of pure ice separated by interdendritic regions with high powder content. After f...
متن کاملShape-memory NiTi–Nb foams
A new powder metallurgy technique for creating porous NiTi is demonstrated, combining liquid phase sintering of prealloyed NiTi powders by Nb additions and pore creation by NaCl space-holders. The resulting foams exhibit well-densified NiTi–Nb walls surrounding interconnected pores created by the space-holder, with controlled fraction, size, and shape. Only small amounts of Nb (3 at.%) are need...
متن کاملTitanium with aligned, elongated pores for orthopedic tissue engineering applications.
Porous titanium with elongated and aligned pores, mimicking the anisotropic structure of bone, was created by solid-state expansion of argon trapped in elongated pores between titanium wires. Both elastic moduli and yield strengths are larger in the longitudinal direction (E = 51 GPa, sigma y = 338 MPa) than in the transverse direction (E = 41 GPa, sigma y = 267 MPa). Finite-element analysis of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009