Fabrication and properties of Lotus-type porous nickel-free stainless steel for biomedical applications

被引：43

作者：

Alvarez, K. ^{[1
]}

Sato, K. ^{[1
]}

Hyun, S. K. ^{[1
]}

Nakajima, H. ^{[1
]}

机构：

[1] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan

来源：

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2008年 / 28卷 / 01期

关键词：

porous nickel-free stainless steel; Lotus-type porous morphology; high temperature nitriding; magnetic susceptibility;

D O I：

10.1016/j.msec.2007.01.010

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

Lotus-type porous Fe-25 wt.%Cr, Fe-23 wt.%Cr-2 wt.%Mo alloys and type AISI 446 stainless steel were fabricated by continuous zone melting technique in pressurized hydrogen and helium gas. The porosity of the samples varied in the range 44-48% and the mean pore size values obtained (145-374 mu m) are in the biomedical field desired range. The fabricated Lotus-type porous nickel-free stainless steel was nitrided at high temperature up to the nitrogen concentration of 1.0 wt.% and this amount resulted to be sufficient for maintaining almost single-phase austenitic structure at room temperature. The combination of very small magnetic susceptibility, light weight, mechanical properties close to the human cortical bone, together with the known good enough corrosion resistance of high nitrogen nickel-free stainless steel, makes this Lotus-type porous Fe-Cr-N alloys very attractive for bone implant applications. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：44 / 50

页数：7

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