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Microstructures high-temperature alloys

Oxidation morphology is globally the same for other Cr-rich high-temperature alloys like Alloy 230 and AUoy X exposed to oxidizing helium but for the extent of processes. Fig. 3.13 plots evolution of the above-listed microstructural features with time. All oxidation-induced phenomena visibly follow parabolic laws with specific rate constants. It was shown that surface oxidation is the first contributor to the mass gain, with a measurable part issuing from internal oxidation for AUoy 617. [Pg.91]

Heat treatment. Solid-solution-strengthened high-temperature alloys are normally supplied in the solution-heat-treated condition unless otherwise specified. In this condition, microstructures generally consist of primary carbides dispersed in a single-phase matrix, with essentially clean grain boundaries. This is usually the optimum condition for the best elevated temperature properties in service and the... [Pg.673]

The equilibrium, room temperature structure of pure cobalt is hep. The fee structure is stable at high temperatures (422 °C to 1495 °C) and has been retained at room temperature by rapid solidification techniques [101], X-ray diffraction analysis was used to probe the microstructure of bulk Co-Al alloy deposits containing up to 25 a/o Al and prepared from solutions of Co(II) in the 60.0 m/o AlCfi-EtMelmCl melt. Pure Co deposits had the hep structure no fee Co was observed in any of the deposits. The addition of aluminum to the deposit caused a decrease in the deposit grain size and an increase in the hep lattice volume. A further increase in the aluminum content resulted in amorphization of the deposit [44], Because the equilibrium... [Pg.298]

Hong HS, Chae US, Choo ST, Lee KS (2006) Microstructure and electrical conductivity of Ni/YSZ and NiO/YSZ composites for high temperature electrolysis prepared by mechanical alloying. J Power Sources 149 84-89... [Pg.97]

Zirconium is known as an alloying element that improves the high temperature properties of Ti-Si alloys via increasing the matrix hardenability as well as through microstructural modification [1-4], The formation of two... [Pg.229]

MICROSTRUCTURAL EFFECTS AND KINETICS OF HIGH TEMPERATURE OXIDATION IN NB-SI BASE ALLOYS... [Pg.315]

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See also in sourсe #XX -- [ Pg.182 ]



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Alloying high-temperature alloys

High Alloys

High temperature alloys

Microstructure alloy

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