Thermal and mechanical properties of hydrides of Zr–Hf alloys

Figures & data

Figure 1. XRD patterns for Zr-containing Hf hydrides (Zr_0.0175Hf_0.9825H_1.63, Zr_0.045Hf_0.955H_1.63, Zr_0.10Hf_0.90H_1.67), together with literature data for Zr hydrides and Hf hydrides.

Figure 2. Cubic lattice parameter for Zr-containing Hf hydrides as a function of Hf content, x, together with literature value for Zr hydrides.

Figure 3. FE-SEM micrograph and EDX maps of surface of Zr_0.10Hf_0.90H_1.68.

Figure 4. Bulk densities of Zr-containing Hf hydrides calculated from the weights and dimensions of the samples as a function of the hydrogen content (C_H = H/M), together with literature data for Zr hydrides and Hf hydrides.

Figure 5. DTA and TG curves for Zr-containing Hf hydrides in argon gas flow.

Figure 6. DTA and TG curves for Zr-containing Hf hydrides in air.

Figure 7. High-temperature XRD patterns for Zr-containing Hf hydrides in helium gas flow, together with literature data for Hf hydrides and Hf.

Figure 8. High-temperature XRD patterns for Zr-containing Hf hydrides in air, together with literature data for Hf hydrides, Hf, and Hf oxide.

Table 1. Lattice parameter, sample bulk density, and relative density of representative samples for measurements of thermal and mechanical properties.

Composition	Lattice parameter, a (nm)	Measured density, d (g/cm^3)	Relative density (%T. D.)
Zr0.0175Hf0.9825H1.65	0.4701	10.9	96
Zr0.045Hf0.955H1.63	0.4703	10.8	96
Zr0.10Hf0.90H1.67	0.4708	10.4	95

Figure 9. Cubic lattice parameter for Zr-containing Hf hydrides as a function of temperature.

Figure 10. Specific heat capacity for Zr-containing Hf hydrides as a function of temperature, together with literature data for Zr hydrides.

Figure 11. Thermal diffusivity for Zr-containing Hf hydrides as a function of temperature, together with literature data for Hf hydrides and Zr hydrides.

Figure 12. Thermal conductivity for Zr-containing Hf hydrides as a function of temperature, together with literature data for Hf hydrides and Zr hydrides.

Figure 13. Vickers hardness for Zr-containing Hf hydrides as a function of hydrogen content (C_H = H/M), together with literature data for pure Hf, Hf hydrides and Zr hydrides.

Figure 14. Young's modulus of the hydrides of Zr–Hf alloys as a function of the hydrogen content (C_H = H/M), together with the literature data of pure Hf, Zr hydrides, and Hf hydrides.