Abstract
Transformation and change in the microstructure of Nd2Fe14B compound under electron irradiation were examined. The Nd2Fe14B compound did not maintain its original structure under electron irradiation and was transformed to an amorphous phase through solid-state amorphization. With further electron irradiation, crystallization of the amorphous phase occurred forming a nano-crystalline structure. The phase selection of electron irradiation induced crystallization depended strongly on the irradiation temperature; nanocrystalline � -Fe phase precipitated in the amorphous phase at 104 K, while a nanoduplex structure composed of � -Fe, compounds and residual amorphous phase was formed at 298 K. Electron irradiation induced phase transformation is a very effective method to control the nanocrystalline structure in Fe-Nd-B alloy. [doi:10.2320/matertrans.47.1762]
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