A new dental superalloy system. 3. Microstructure and phase transformations.
نویسندگان
چکیده
A microstructural study was conducted on 15 cobalt-chromium-nickel alloys of the basic composition 40 Co-30 Ni-30 Cr. The alloys were strengthened by the addition of tantalum and tantalum-rich regions were found at the interdendritic spaces. The increase in Ta concentration caused a decrease in the concentration of the a phase and an increase in the amounts of the a phase. Excessive amounts of Ta resulted in formation of the a phase. The failure of the alloy occurred as a result of the interconnection of a regions.
منابع مشابه
A new dental superalloy system. V. Embrittling phase transformations.
The aphase is rich in Ta. When the Ta concentration is less than 14%N, adoes not interfere with the slip mechanism; when the Ta concentration is more than 15%, ainterferes with the slip mechanism. The coherent at-Co 3Ta phase forms at Ta concentrations of less than 15%1, whereas incoherent 7-Co2Ta forms only at higher Ta concentrations. The interface between aand the matrix is an important fact...
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ورودعنوان ژورنال:
- Journal of dental research
دوره 52 1 شماره
صفحات -
تاریخ انتشار 1973