Figure 10

Measured hydrogen permeation flux during cooling from 400 °C at a cooling rate of 2 °C min⁻¹ for the as-cast Nb₄₀Ti₃₀Ni₃₀, Nb₃₅Mo₅Ti₃₀Ni₃₀ and Nb₃₀Mo₁₀Ti₃₀Ni₃₀ alloy membranes. Before cooling, the alloys were placed in a hydrogen permeation atmosphere of 0.7 MPa pressure difference at 400 °C for 4 h.