Fig. 3. XRD patterns of samples treated in gas mixture of 0.25%, 0.50%, 0.75% and 1.00% CH4 in 80% H2+20% Ar. Samples treated at 723 K, for 4 h, gas mixture flow rate of 1.67×10−6 Nm3 s−1 and pressure of 400 Pa.
Fig. 3. XRD patterns of samples treated in gas mixture of 0.25%, 0.50%, 0.75% and 1.00%CH4 in 80% H2+20% Ar. Samples treated at 723 K, for 4 h, gas mixture flow rate of1.67×10−6 Nm3 s−1 and pressure of 400 Pa.