Development of Dental Alloys alternative to Ag-Pd-Cu-Au Alloys

开发替代 Ag-Pd-Cu-Au 合金的牙科合金

基本信息

  • 批准号:
    13672044
  • 负责人:
  • 金额:
    $ 2.56万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2001
  • 资助国家:
    日本
  • 起止时间:
    2001 至 2002
  • 项目状态:
    已结题

项目摘要

Experimental Pd-free Ag-Au-Pt-Cu alloys with various chemical compositions were prepared to substitute for traditional dental Ag-Pd-Cu-Au alloys. Liquidus and solidus temperatures were determined from DSC data. Spectrophotometric colorimetry was performed to investigate the optical properties and to quantify the tarnish resistance in the 0.1% Na_2S solution. Principal results obtained are as follows.1. In the alloys with the same Au content, both liquidus and solidus temperatures lowered with increasing Cu content. Solidification temperature range became narrow with increasing Cu content.2. In all the experimental alloys, spectral reflectance was high in the long-wavelength region and very low in the short-wavelength region due to the effective absorption of light.3. In the alloys with the same Cu content, the absorption edge systematically moved towards longer wavelength direction with increasing Au content. Simultaneously, spectral reflectance in the long-wavelength region slightly decreased with increasing Au content. Owing to these systematic variations of spectral reflectance curves, chromaticity index b^* (yellow-blue) apparently increased, giving a gold tinge to the alloy.4. In the alloys with the same Cu content of 15 at.% or 20 at.%, tarnish resistance of the alloys in the 0.1% Na_2S solution was markedly improved with Au content.5. Among the three coordinates, L^*, a^*, b^*, in the CIELAB color space, decrease in L^*-value effectively affected the color change, ΔE^*, of the material in the tarnish test solution.
制备了不同化学成分的无钯银-金-铂-铜合金,以替代传统的牙科用银-钯-铜-金合金。液相和固相温度由DSC数据测定。采用分光光度比色法考察了该材料在0.1% Na_2S溶液中的光学性能,并定量测定了其抗变色性能。得到的主要结果如下:在相同Au含量的合金中,随着Cu含量的增加,液相和固相温度均降低。随着Cu含量的增加,凝固温度范围变窄。在所有的实验合金中,由于对光的有效吸收,光谱反射率在长波长区域高,在短波长区域很低。在相同Cu含量的合金中,随着Au含量的增加,吸收边有系统地向长波方向移动。同时,随着Au含量的增加,长波区的光谱反射率略有下降。由于光谱反射率曲线的这些系统变化,色度指数b^*(黄蓝色)明显增加,使合金具有金色的色调。在铜含量为15at的合金中。%或20%。在0.1% Na_2S溶液中,随着Au含量的增加,合金的抗失光泽性显著提高。在CIELAB色彩空间的L^*、a^*、b^*三个坐标中,L^*值的减小有效地影响了材料在失光测试溶液中的颜色变化ΔE^*。

项目成果

期刊论文数量(17)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Y.Tanaka, et al.: "Nanostructure Analysis on the Metal-Bond-Porcelain Using Titanium by TEM and EELS"Proceedings of The Fourth Pacific Rim International Conference on Advanced Materials and Processing. 265-268 (2001)
Y.Tanaka 等人:“通过 TEM 和 EELS 对使用钛的金属结合剂瓷进行纳米结构分析”第四届环太平洋先进材料与加工国际会议论文集。
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    0
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  • 通讯作者:
H.-J.Seol, et al.: "Partial phase diagram for the AuCu-Zn pseudobinary system"Journal of Alloys and Compounds. 339. 144-148 (2002)
H.-J.Seol 等人:“AuCu-Zn 伪二元系统的部分相图”合金与化合物杂志。
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SHIRAISHI Takanobu其他文献

SHIRAISHI Takanobu的其他文献

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{{ truncateString('SHIRAISHI Takanobu', 18)}}的其他基金

Development of low elastic modulus titanium alloys forbone substitution
低弹性模量骨替代钛合金的研制
  • 批准号:
    22592187
  • 财政年份:
    2010
  • 资助金额:
    $ 2.56万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of high corrosion resistant and wear resistant Ti-Zr alloys for bone substitution
高耐蚀耐磨钛锆骨替代合金的研制
  • 批准号:
    19592250
  • 财政年份:
    2007
  • 资助金额:
    $ 2.56万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of Titanium Alloys with Low Elastic Modulus and High Corrosion Resistance designed on the Basis of Quantum Chemistry Theory
基于量子化学理论设计的低弹性模量高耐蚀钛合金的开发
  • 批准号:
    16591960
  • 财政年份:
    2004
  • 资助金额:
    $ 2.56万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

相似海外基金

Development of microstracture on increasing fatigue toughness of dental Ag-Pd-Cu-Au alloy
提高牙科Ag-Pd-Cu-Au合金疲劳韧性的显微组织的开发
  • 批准号:
    11671965
  • 财政年份:
    1999
  • 资助金额:
    $ 2.56万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
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