The Investigation of the Equilibrium State of the Ternary Whole System Copper-Nickel-Silicon. III
1939; Japan Institute of Metals and Materials; Volume: 3; Issue: 10 Linguagem: Inglês
10.2320/jinstmet1937.3.10_365
ISSN1880-6880
Autores Tópico(s)Intermetallics and Advanced Alloy Properties
ResumoThe ternary equilibrium state of the system copper-nickel-silicon relating to liquid was thoroughly investigated by thermal and X-ray analyses as well as microscopic examination, and heterogeneous equilibria were determined by the construction of many sectional diagrams using many specimens. As shown in Fig. 2 (quantitatively drawn) and Fig. 3 (qualitatively drawn) the diagram is very complicated. The binary systems are not formed on the lines Cu-Ni2Si, Cu-Ni5Si2, Cu-NiSi, Cu3Si-Ni2Si, Cu3Si-Ni5Si2 and Cu3Si-NiSi, the last one being liable to be taken for a binary system but clear microscopically that it is not formed on the line; accordingly no binary system does exist in this system. Moreover, the phases appearing in Cu-Si system do not form continuous solid solutions solutions with those in Ni-Si system. The significant points in the diagram are as follows:-there exists a ternary compound ω in the composition range of about 12-15% of Si and about 11-12% of Ni, which is formed by the ternary peritectic reaction L+γ+θ→ω at 859°; the γ phase stated in the 1 st. report of this investigation is formed in the ternary system by the binary peritectic reaction L+γ'+γ. the line of this reaction having a peak of temperature at 954° (the point s3';) and falling from this point to each side rich or poor in silicon. The reactions and the ranges of 13 primary crystals, 26 monovariant curves and 13 non-variant points are given in Tables 1, 2, and 3.4 respectively.
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