Abstract

Static high pressure diamond anvil cell experiments were performed on threepolycrystalline Zr samples having varying interstitial impurity concentrations. Systematicincrease in transition pressure with the increase in the amount of interstitial impurities isobserved for the martensitic structural phase transition in Zr. Significant room temperature crystal grain growth isalso observed for the two highest purity samples at the transition. In the case of the lowest purity sample interstitial impurities obstruct the transition, while possibly helping impede grain growth—even as the sample is heated to1279 K.

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