Analysis of Ostwald ripening in Ni-rich Ni-Ti alloys by diffusion couples
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- 作者：C. G. Garay-Reyes (1)
F. Hernández-Santiago (2)
N. Cayetano-Castro (3)
R. Martínez-Sánchez (4)
J. L. Hernández-Rivera (4)
H. J. Dorantes-Rosales (5)
J. J. Cruz-Rivera (1) - 关键词：Diffusion couple ; nickel ; based alloys ; γ-precipitates coarsening ; TIDC theory ; LSW theory ; anomalous coarsening
- 刊名：Bulletin of Materials Science
- 出版年：2014
- 出版时间：June 2014
- 年：2014
- 卷：37
- 期：4
- 页码：823-829
- 全文大小：1,047 KB
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F. Hernández-Santiago (2)
N. Cayetano-Castro (3)
R. Martínez-Sánchez (4)
J. L. Hernández-Rivera (4)
H. J. Dorantes-Rosales (5)
J. J. Cruz-Rivera (1)
1. Instituto de Metalurgia, Universidad Autónoma de San Luis Potosí, Sierra leona 550, Col. Lomas 2 sección, México, 78210, SLP, México
2. Instituto Politécnico Nacional, ESIME-AZC, Av. de las Granjas 682, Col. Sta. Catarina, 02550, México, DF, México
3. División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, camino a la Presa San José 2055, Col. Lomas 4 sección, 78216, México, SLP, México
4. Centro de Investigación de Materiales Avanzados (CIMAV), Laboratorio Nacional de Nanotecnología, Miguel de Cervantes 120, ZC, 311109, Chihuahua, México
5. Instituto Politécnico Nacional, ESIQIE-DIM, 118-556, DF, México, México - ISSN：0973-7669
文摘
The coarsening kinetics of γ-precipitates in Ni-rich Ni-Ti alloys are studied using a Ni-11.5 wt% Ti and pure Ni diffusion couple. The formed concentration gradient allowed to study the aging process at 1023 K (750 °C) in Ni-rich Ni-Ti alloys with Ti content from 8.62 to 11.15 wt% Ti. In general, during the coarsening of γ-precipitates, the experimental coarsening kinetics do not fit well to the LSW or TIDC theoretical models and anomalous behaviour of coarsening rate constant (k r) associated with γ-volume-fraction is confirmed at high values.