Palladium permeation flux measurements

Measurement of palladium membrane permeability. The permeation rate of hydrogen gas through the palladium membrane, Q , was assumed to obey the half-power pressure law(20). The permeation flux of hydrogen through the membrane is proportional to the difference between the souare roots of the hydrogen partial pressure on the high and low pressure sides of membrane. 

Measurement of the steady state permeation flux for both the crystalline V-Ti-Ni alloys (see microstracture of V51-Ti28-Ni21 and V54-Ti28-Nil8 alloys in Figure 6) and the amorphous metalhc glass materials was conducted and compared to hterature data for palladium membranes. 

The possible preparation of InAs by crystallization from the melt depends also on the liquidus shape (especially in the In-rich region). A summary of previous liquidus measurements was reported by De Winter and Pollack (1986) who employed a source dissolution method based on the equilibration, at a fixed temperature, of a known quantity of high-purity indium with single crystals of InAs, the weight loss of which was determined. The experiments were carried out under a flux of hydrogen purified via permeation through palladium. 

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