Porous Titanium Scaffolds Fabricated by Metal Injection Moulding for Biomedical Applications

被引：18

作者：

Dehghan-Manshadi, Ali ^{[1
]}

Chen, Yunhui ^{[2
]}

Shi, Zhiming ^{[1
]}

Bermingham, Michael ^{[1
]}

StJohn, David ^{[1
]}

Dargusch, Matthew ^{[1
]}

Qian, Ma ^{[3
]}

机构：

[1] Univ Queensland, Sch Mech & Min Engn, Queensland Ctr Adv Mat Proc & Mfg AMPAM, St Lucia, Qld 4072, Australia

[2] UCL, Dept Mech Engn, Torrington Pl, London WC1E 7JE, England

[3] RMIT Univ, Ctr Addit Mfg, Sch Engn, Melbourne, Vic 3000, Australia

来源：

MATERIALS | 2018年 / 11卷 / 09期

关键词：

titanium; metal injection moulding; space holder; scaffold; mechanical properties; corrosion; MECHANICAL-PROPERTIES; CORROSION BEHAVIOR; BONE; ALLOYS; MICROSTRUCTURE; POROSITY; IMPLANT; BIOCOMPATIBILITY; PARAMETERS; TI-6AL-4V;

D O I：

10.3390/ma11091573

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Biocompatible titanium scaffolds with up to 40% interconnected porosity were manufactured through the metal injection moulding process and the space holder technique. The mechanical properties of the manufactured scaffold showed a high level of compatibility with those of the cortical human bone. Sintering at 1250 degrees C produced scaffolds with 36% porosity and more than 90% interconnected pores, a compressive yield stress of 220 MPa and a Young's modulus of 7.80 GPa, all suitable for bone tissue engineering. Increasing the sintering temperature to 1300 degrees C increased the Young's modulus to 22.0 GPa due to reduced porosity, while reducing the sintering temperature to 1150 degrees C lowered the yield stress to 120 MPa, indicative of insufficient sintering. Electrochemical studies revealed that samples sintered at 1150 degrees C have a higher corrosion rate compared with those at a sintering temperature of 1250 degrees C. Overall, it was concluded that sintering at 1250 degrees C yielded the most desirable results.

引用

页数：13

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