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钛材料作为目前生物医用性能最好的材料,具有一系列的优良性能,如高比强度、低弹性模量、优良的耐磨耐蚀性和优异的生物相容性。金属粉末微注射成形(Micro MIM)技术作为一种新兴的微加工技术,为钛材料在生物医用微型植入物领域的应用提供了一种低成本、大批量、近净成形途径。利用微注射成形技术制备了纯钛微型试样,并对试样进行了脱粘和烧结。通过调整脱粘和烧结工艺参数,制得整体性能如下的试样:氧质量分数0.240%,氮质量分数0.028%,屈服强度450 MPa,极限抗拉强度565 MPa,伸长率18.0%,相对密度97.3%。试样的整体性能满足ASTM F2989-13外科植入用金属微注射成形纯钛构件要求。
As the best biomedical material, titanium material has a series of excellent properties such as high specific strength, low elastic modulus, excellent wear and corrosion resistance and excellent biocompatibility. As a new micro-fabrication technology, Micro MIM technology provides a low-cost, high-volume and near-net shaping method for the application of titanium materials in biomedical micro implants. Micro-injection molding technology was used to prepare micro-titanium micro-samples, and the samples were debonding and sintering. By adjusting the parameters of debonding and sintering, the overall properties of the samples were as follows: oxygen mass fraction 0.240%, nitrogen content 0.028%, yield strength 450 MPa, ultimate tensile strength 565 MPa, elongation 18.0%, relative density 97.3%. The overall properties of the specimen meet the requirements of ASTM F2989-13 for metal microinjection forming of titanium components for surgical implantation.