Mechanical properties of yttrium hydrogen solid solution

The mechanical properties of yttrium hydrogen solid solution (0-0.20 H/Y) were studied to reveal the influence of hydrogen on the characteristics of yttrium. The elastic moduli such as Young's modulus and the shear modulus for yttrium hydrogen solid solution increased with increasing of hydrogen content. The microhardness for the solid solution was also increased with increasing of hydrogen content. The electronic structure of the yttrium hydrogen solid solution was evaluated by a first principle molecular orbital calculation. The mechanical properties of yttrium hydrogen solid solution were discussed in terms of the calculation results.