The vickers-microhardness of superconductors increases with increasing temperature.please can anyone provide a reference that explains such increase?

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Mohamed Walid Azizi

Hi Hanan,

The superconducting transition temperatures and hardness depend on the addition content of the samples. The hardness is found to be load dependent. From the relation between applied load F and the square of the impression diagonal, d2, the true hardness, H0, and the dissipative portion of the indentation load F0, were derived from the slope and the intercept (at d2 = 0) of the straight line, respectively. The sharpest transition may be attributed to a high homogeneity of the superconducting grains. Moreover, the Vickers microhardness (VHN) and the bulk density are also increased with annealing temperature increase.

Regards,

H. T. Rahal

dear Dr.Mohamed Walid Azizi

Thank you for your answer.please can you provide an article for this?

regards

Dear Hanan,

The following articles are a good guide to answer your question.

Good luck,