共查询到18条相似文献,搜索用时 93 毫秒
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生物医用钛合金发展和研究现状 总被引:1,自引:0,他引:1
概述了生物医用钛合金的发展历程,详细总结了以Ti6A l7Nb为代表的α+β型和单β型生物医用钛合金国内外研究现状,指出了当今生物医用钛合金研究所面临的问题和发展方向。 相似文献
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医用钛合金及其表面改性 总被引:12,自引:0,他引:12
目前钛合金被广泛应用于医学领域,如矫形用种植体。简要综述了新型医用钛合金的开发以及钛合金表面改性提高其表面生物活性和耐磨性能的研究进展。 相似文献
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新型口钛合金具有良好的耐磨性和力学性能、高抗腐蚀性以及优良的生物相容性,因而在生物医学领域得到了越来越广泛的应用.综述了钛合金的发展阶段及新型超弹性β钛舍金的研究发展状况和最新进展,探讨了几种热处理工艺对钛合金超弹性的影响,介绍了几种钛合金表面改性方法,结合我国研究现状提出了新型超弹性β钛合金存在的问题,展望了其研究发展方向. 相似文献
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新型β钛合金具有良好的耐磨性和力学性能、高抗腐蚀性以及优良的生物相容性,因而在生物医学领域得到了越来越广泛的应用.综述了钛合金的发展阶段及新型超弹性β钛合金的研究发展状况和最新进展,探讨了几种热处理工艺对钛合金超弹性的影响,介绍了几种钛合金表面改性方法,结合我国研究现状提出了新型超弹性β钛合金存在的问题,展望了其研究发展方向. 相似文献
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生物医用有色金属材料发展迅速,形成了适应不同体内环境、不同组织的医用有色金属材料及器件体系;着眼未来开展领域研究规划,提升新型医用有色金属材料及器件的临床应用水平,兼具理论研究与实践应用价值。本文论述了生物医用有色金属材料在耐蚀性、耐磨性、疲劳强度及韧性、生物适配性等方面的关键性能要求,系统梳理了永久性植入有色金属材料、生物可降解有色金属材料、多孔医用有色金属材料、医用有色金属表面改性等细分领域的研究进展、发展趋势与科学问题。在凝练各类生物医用有色金属材料未来研究方向的基础上,提出了加强基础与关键核心技术研究、组建“产学研医监”协同创新体、建立相关标准及规范、培育高精尖人才体系等发展建议,以期为新型材料发展布局与前沿技术研发提供先导性参考。 相似文献
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由于具有优良的力学、生物学、安全性等性能,钛及其合金被日益广泛的应用于人体硬组织的修复、替换。然而其表面硬度低、耐磨性差、生物惰性等是作为医用材料不容忽视的问题,为了改善这些性能,需要对钛合金表面进行改性处理。综合评述了多种表面处理技术的优点,指出对多种表面处理技术进行综合应用是今后的研究方向。 相似文献
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Mitsuo Niinomi 《Science and Technology of Advanced Materials》2013,14(5):445-454
Nb, Ta and Zr are the favorable non-toxic alloying elements for titanium alloys for biomedical applications. Low rigidity titanium alloys composed of non-toxic elements are getting much attention. The advantage of low rigidity titanium alloyfor the healing of bone fracture and the remodeling of bone is successfully proved by fracture model made in tibia of rabbit. Ni-free super elastic and shape memory titanium alloys for biomedical applications are energetically developed. Titanium alloys for not only implants, but also dental products like crowns, dentures, etc. are also getting much attention in dentistry. Development of investment materials suitable for titanium alloys with high melting point is desired in dental precision castings. Bioactive surface modifications of titanium alloys for biomedical applications are very important for achieving further developed biocompatibility. Low cost titanium alloys for healthcare goods, like general wheel chairs, etc.has been recently proposed. 相似文献
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S. D. Luo 《Materials and Manufacturing Processes》2018,33(1):35-49
Microwave (MW) radiation has attracted increasing attention in the fabrication and/or synthesis of titanium (Ti) and Ti alloys from powder since 1999 when the first study was reported by Gedevanishvili et al. This article provides a comprehensive review of MW processing of Ti and Ti alloys. It begins by discussing the critical technical issues associated with MW processing of Ti powder, including the heating response of Ti powder to MW radiation, temperature measurement by infrared pyrometry and calibration, and interstitial absorption and control. This is followed by a detailed review of the sintering of a range of powder metallurgy (PM) Ti and Ti alloys for structural, biomedical, and shape memory applications. As a new development in the field, MW heating and sintering of titanium hydride (TiH2) powder for the fabrication of PM Ti are discussed in terms of the heating response, interstitial contamination, microstructure, and tensile properties of the as-sintered Ti. The challenges that face MW sintering of PM Ti from either Ti powder or TiH2 powder are reviewed, and solutions are proposed. Based on the heating and isothermal sintering characteristics by MW radiation, recommendations are made for the applications of MW processing of Ti and Ti alloys. 相似文献
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In spinal fixation devices, the Young's modulus of the metallic implant rod should be not only sufficiently low to prevent stress shielding for the patient but also sufficiently high to suppress springback for the surgeon. This paper proposes a novel function of biomedical titanium alloys—self-adjustment of Young's modulus. Deformation-induced ω phase transformation was introduced into β-type titanium alloys so that the Young's modulus of only the deformed part would increase during operation, while that of the non-deformed part would remain low. The Young's modulus increase by deformation was investigated for a binary Ti-12Cr alloy. This alloy successfully underwent deformation-induced ω phase transformation and exhibited the increase in the Young's modulus by deformation. 相似文献
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Truckenmüller R Giselbrecht S Rivron N Gottwald E Saile V van den Berg A Wessling M van Blitterswijk C 《Advanced materials (Deerfield Beach, Fla.)》2011,23(11):1311-1329
For roughly ten years now, a new class of polymer micromoulding processes comes more and more into the focus both of the microtechnology and the biomedical engineering community. These processes can be subsumed under the term "microthermoforming". In microthermoforming, thin polymer films are heated to a softened, but still solid state and formed to thin-walled microdevices by three-dimensional stretching. The high material coherence during forming is in contrast to common polymer microreplication processes where the material is processed in a liquid or flowing state. It enables the preservation of premodifications of the film material. In this progress report, we review the still young state of the art of microthermoforming technology as well as its first applications. So far, the applications are mainly in the biomedical field. They benefit from the fact that thermoformed microdevices have unique properties resulting from their special, unusual morphology. The focus of this paper is on the impact of the new class of micromoulding processes and the processed film materials on the characteristics of the moulded microdevices and on their applications. 相似文献
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The long-term failure of the total hip and knee prostheses is attributed to the production of wear particles at the articulating
interface between the metals, ceramics and polymers used for surgical implants and bone-fixtures. Therefore, finding an adhesive
and inert coating material that has low frictional coefficient should dramatically reduce the production of wear particles
and hence, prolong the life time of the surgical implants. The novel properties of the non-toxic diamond-like carbon (DLC)
coatings have proven to be excellent candidates for biomedical applications. However, they have poor adhesion strength to
the alloys and biomaterials. The addition of a thin interfacial layer such as Si, Ti, TiN, Mo and Cu/Cr and/or adding additives
such as Si, F, N, O, W, V, Co, Mo, Ti or their combinations to the DLC films has been found to increase the adhesion strength
substantially. In our study, grade 316L stainless steel and grade 5 titanium alloy (Ti-6Al-4V) were used as biomaterial substrates.
They were coated with DLC films containing boron additives at various levels using various Si interfacial layer thicknesses.
The best film adhesion was achieved at 8% and 20% on DLC coated Ti-6Al-4V and grade 316L substrates, respectively. It has
been demonstrated that doping the DLC with boron increases their adhesion strength to both substrates even without silicon
interfacial layer and increases it substantially with optimum silicon layer thickness. The adhesion strength is also correlated
with the hydrogen contents in the B-DLC films. It is found to reach its maximum value of 700 kg/cm2 and 390 kg/cm2 at 2/7 and 3/6 for CH4/Ar partial pressures (in mTorr ratio) for Ti-6Al-4V and 316L substrates, respectively. 相似文献