镍钽合金的研究。（第2部分）时效硬化与金属-陶瓷结合（作者译）

[Studies on Ni-Ta alloys. (Part 2) Age-hardening and metal-to-ceramic bonding (author's transl)].

作者信息

Kaga M

出版信息

Shika Rikogaku Zasshi. 1979 Jan;20(49):44-51.

Abstract

Age-hardening and metal-to-ceramic bonding were studied on Ni-Ta alloy for dental application. In the first experiment, it was shown the precipitation-hardening was recognized in Ni-33 wt% Ta, Ni-34 wt% Ta except for Ni-30 wt% Ta. The precipitates were of a Widmamstätten type structure and appeared to be a intermetallic compound, namely Ni3Ta, from the results of X-ray diffraction (debyesherrer) despite of the close proximity of the diffraction patterns of Ni and Ni2Ta. In the second experiment, it was shown that the bonding strength was 176 kg/cm2 for Ni-30 wt% Ta-ceramic system, compared with that of 222 kg/cm2 of Wiron S-ceramic system. The oxide layer was as wide as 3 approximately 5 micron at the Ni-30 wt% Ta-ceramic interface, in which high concentrations of Ni, Ta, and low concentrations of Al, Si were observed. The coefficient of thermal expansion, which was larger than that of porcelain, was 17.4 x 10(-6)/degrees C for Ni-30 wt% Ta.

摘要

对用于牙科的镍 - 钽合金的时效硬化和金属与陶瓷的结合进行了研究。在第一个实验中，结果表明，除了Ni - 30 wt% Ta之外，在Ni - 33 wt% Ta、Ni - 34 wt% Ta中观察到沉淀硬化现象。析出物为魏氏组织类型结构，尽管镍和Ni₂Ta的衍射图谱非常接近，但根据X射线衍射（德拜 - 谢乐）结果，析出物似乎是一种金属间化合物，即Ni₃Ta。在第二个实验中，结果表明，Ni - 30 wt% Ta - 陶瓷系统的结合强度为176 kg/cm²，而Wiron S - 陶瓷系统的结合强度为222 kg/cm²。在Ni - 30 wt% Ta - 陶瓷界面处，氧化层宽度约为3至5微米，其中观察到高浓度的Ni、Ta以及低浓度的Al、Si。Ni - 30 wt% Ta的热膨胀系数大于瓷器的热膨胀系数，为17.4×10⁻⁶/℃。