Molybdenum carbides phase diagram

Kuol] Kuo, K., Carbides in Chromium, Molybdenum, and Tungsten Steels , J. Iron Steel Inst., 173, 363-375 (1953) (Crys. Structure, Phase Diagram, Phase Relations, Experimental, 45)... 

Dav] Davenport, E.S., Bain, E.C., Transformation of Austenite at Constant Subcritical Temperatures , Transactions Amer. Inst, of Mining and Met. Eng. Iron and Steel Div, 117. (1930) [1932Takl] Takei, T., On flie Ferromagnetic Carbides in Molybdenum Steels , Kinzoku no Kenkyu, 9, 97-124 (1932) (Phase Diagram, Experimental, 5)... 

Kuo3] Kuo, K., X-Ray Investigation of Carbides in Molybdenum Steels (in Swedish), Jernkon-torets Ann., 137(5), 141-148 (1953) (Experimental, Crys. Structure, Phase Diagram, 17) [1959Fuw] Fuwa, T., Chipman J., Activity of Carbon in Liquid-Iron Alloys , Trans. AIME, 215, 708... 

Fra] Fraker, A.C., Stadelmaier, H.H., The q Carbides of Molybdenum-Iron, Molybdenum-Cobalt and Molybdenum-Nickel , Trans. AIME, 245, 847-850 (1969) (Phase Diagram, Crys. Structure, Experimental, Morphology, 20)... 

One of the most important attributes of nickel with respect to the formation of corrosion-resistant alloys is its metallurgical compatibility with a number of other metals, such as copper, chromium, molybdenum, and iron. A survey of the binary phase diagrams for nickel and these other elements shows considerable solid solubility, and thus one can make alloys with a wide variety of composition. Nickel alloys are, in general, all austenitic alloys however, they can be subject to precipitation of intermetallic and carbide phases when aged. In some alloys designed for high-temperature service, intermetallic and carbide precipitation reactions are encouraged to improve properties. However, for corrosion applications, the precipitation of second phases usually promotes corrosion attack. The problem is rarely encountered because the alloys are supplied in the annealed condition and the service temperatures rarely approach the level required for sensitization. 

For the electrodeposition of molybdenum and tungsten carbides, we used oxide tungstate-molybdate-carbonate melts. The phase diagrams of cathodic products in the studied systems depending on the conditions of electrolysis are presented in Figures 4.9.4-4.9.7. 

Excess molybdenum, as derived from Reactions 4 and 6, can oxidize to volatile M0O3 or can be incorporated into the carbide lattice, forming solid solutions. The reactions 3-7 discussed above are feasible and the products, according to the Zr-Si binary phase diagram, are liquid at the sintering temperature applied. 

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