Department of Dental Materials Science, Tokyo Dental College, 1-2-2 Masago, Mihama-ku, Chiba 261-8502, Japan.
Dent Mater J. 2010 Oct;29(5):570-4. doi: 10.4012/dmj.2009-118. Epub 2010 Aug 20.
The mechanical properties of a series of binary Ti-Cr alloys were investigated. Chromium content ranged from 5 to 20 mass%. Dumbbell- and disk-shaped specimens of each alloy were obtained by casting for mechanical testing and microstructural observation. Yield strength (YS) at 0.2%, tensile strength (TS), elongation (EL) and Vickers hardness (Hv) were determined. The TS and YS of Ti-15Cr were similar to those of Ti-20Cr at approximately 880 or 900 MPa and higher than those of cp-Ti by nearly 55%. Among all Ti-Cr alloys, Ti-10Cr showed the lowest EL. At 50 µm below the surface, Hv ranged from 370 to 420. Addition of 15 or 20 mass% chromium to titanium yielded sufficient strength and relatively high elongation values. Judging from the results of the mechanical properties, the suitability of Ti-Cr alloys with 15 or 20 mass% chromium for use in dental prostheses.
研究了一系列二元 Ti-Cr 合金的力学性能。铬含量范围为 5 至 20 质量%。通过铸造获得每种合金的哑铃形和盘形试样，用于力学性能测试和微观结构观察。测定屈服强度（YS）、拉伸强度（TS）、伸长率（EL）和维氏硬度（Hv）。Ti-15Cr 的 TS 和 YS 与约 880 或 900 MPa 的 Ti-20Cr 相似，比 cp-Ti 高近 55%。在所有 Ti-Cr 合金中，Ti-10Cr 的 EL 最低。在距表面 50 µm 处，Hv 范围为 370 至 420。向钛中添加 15 或 20 质量%的铬可获得足够的强度和相对较高的伸长率值。从力学性能的结果来看，15 或 20 质量%铬的 Ti-Cr 合金适用于牙科假体。
