Artículo
Nanocrystalline Al Composites from Powder Milled under Ammonia Gas Flow
Autor/es | Cintas Físico, Jesús
Caballero Sánchez, Eduardo Montes Martos, Juan Manuel Gómez Cuevas, Francisco de Paula Arévalo Mora, Cristina María |
Departamento | Universidad de Sevilla. Departamento de Ingeniería y Ciencia de los Materiales y del Transporte |
Fecha de publicación | 2014 |
Fecha de depósito | 2017-04-11 |
Publicado en |
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Resumen | The production of high hardness and thermally stable nanocrystalline aluminium composites is described. Al powder was milled
at room temperature in an ammonia flow for a period of less than 5 h. NH3 dissociation during ... The production of high hardness and thermally stable nanocrystalline aluminium composites is described. Al powder was milled at room temperature in an ammonia flow for a period of less than 5 h. NH3 dissociation during milling provokes the absorption, at a high rate, of nitrogen into aluminium, hardening it by forming a solid solution. Controlled amounts of AlN and Al5O6N are formed during the subsequent sintering of milled powders for consolidation. The pinning action of these abundant dispersoids highly restrains aluminium grain growth during heating.The mean size of the Al grains remains below 45nm and even after the milled powder is sintered at 650∘C for 1h. |
Cita | Cintas Físico, J., Caballero Sánchez, E., Montes Martos, J.M., Gómez Cuevas, F.d P. y Arévalo Mora, C.M. (2014). Nanocrystalline Al Composites from Powder Milled under Ammonia Gas Flow. Advances in Materials Science and Engineering, 2014, Article number 617241 |
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