Microstructural characterization of Mo-12Si-8.5B alloy subjected to diffusion annealing treatment

S. P. Yang; H. Kou; G. J. Zhang; G. Liu; F. Jiang; J. Sun

doi:10.1016/j.ijrmhm.2009.12.002

Microstructural characterization of Mo-12Si-8.5B alloy subjected to diffusion annealing treatment

S. P. Yang, H. Kou, G. J. Zhang, G. Liu, F. Jiang, J. Sun

Xi'an Jiaotong University

科研成果: 期刊稿件 › 文章 › 同行评审

2 引用（Scopus）

摘要

Microstructural evolutions in the solidification and subsequent diffusion annealing treatment of Mo-12Si-8.5B alloys have been studied by using XRD, OM, SEM and TEM. Because the annealing temperature (1900 °C) is in the vicinity of four-phase equilibrium eutectic reaction (1950 °C) point of L = Mo₃Si + Mo₅SiB₂ (T₂)+Mo_ss (Mo solid solution), the dendrites and lamellar phase have almost been dissolved. Dislocations, Mo_ss precipitates and subgrain boundary have been observed in the T₂ phase while the other phases are not found. In addition, dislocations are from excess vacancy during the annealing treatment and play important roles for the Mo_ss precipitate. The dislocations can serve as the heterogeneous nucleation sites and compose of sub-boundary which refines the grain size to some extent. The results observed in this study can be used as a reference for future work on the relationships between microstructure and mechanical property of the Mo-Si-B alloys.

源语言	英语
页（从-至）	377-382
页数	6
期刊	International Journal of Refractory Metals and Hard Materials
卷	28
期	3
DOI	https://doi.org/10.1016/j.ijrmhm.2009.12.002
出版状态	已出版 - 5月 2010
已对外发布	是

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title = "Microstructural characterization of Mo-12Si-8.5B alloy subjected to diffusion annealing treatment",

abstract = "Microstructural evolutions in the solidification and subsequent diffusion annealing treatment of Mo-12Si-8.5B alloys have been studied by using XRD, OM, SEM and TEM. Because the annealing temperature (1900 °C) is in the vicinity of four-phase equilibrium eutectic reaction (1950 °C) point of L = Mo3Si + Mo5SiB2 (T2)+Moss (Mo solid solution), the dendrites and lamellar phase have almost been dissolved. Dislocations, Moss precipitates and subgrain boundary have been observed in the T2 phase while the other phases are not found. In addition, dislocations are from excess vacancy during the annealing treatment and play important roles for the Moss precipitate. The dislocations can serve as the heterogeneous nucleation sites and compose of sub-boundary which refines the grain size to some extent. The results observed in this study can be used as a reference for future work on the relationships between microstructure and mechanical property of the Mo-Si-B alloys.",

keywords = "Diffusion annealing treatment, Microstructure, Mo-Si-B alloys",

author = "Yang, {S. P.} and H. Kou and Zhang, {G. J.} and G. Liu and F. Jiang and J. Sun",

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T1 - Microstructural characterization of Mo-12Si-8.5B alloy subjected to diffusion annealing treatment

AU - Yang, S. P.

AU - Kou, H.

AU - Zhang, G. J.

AU - Liu, G.

AU - Jiang, F.

AU - Sun, J.

PY - 2010/5

Y1 - 2010/5

N2 - Microstructural evolutions in the solidification and subsequent diffusion annealing treatment of Mo-12Si-8.5B alloys have been studied by using XRD, OM, SEM and TEM. Because the annealing temperature (1900 °C) is in the vicinity of four-phase equilibrium eutectic reaction (1950 °C) point of L = Mo3Si + Mo5SiB2 (T2)+Moss (Mo solid solution), the dendrites and lamellar phase have almost been dissolved. Dislocations, Moss precipitates and subgrain boundary have been observed in the T2 phase while the other phases are not found. In addition, dislocations are from excess vacancy during the annealing treatment and play important roles for the Moss precipitate. The dislocations can serve as the heterogeneous nucleation sites and compose of sub-boundary which refines the grain size to some extent. The results observed in this study can be used as a reference for future work on the relationships between microstructure and mechanical property of the Mo-Si-B alloys.

AB - Microstructural evolutions in the solidification and subsequent diffusion annealing treatment of Mo-12Si-8.5B alloys have been studied by using XRD, OM, SEM and TEM. Because the annealing temperature (1900 °C) is in the vicinity of four-phase equilibrium eutectic reaction (1950 °C) point of L = Mo3Si + Mo5SiB2 (T2)+Moss (Mo solid solution), the dendrites and lamellar phase have almost been dissolved. Dislocations, Moss precipitates and subgrain boundary have been observed in the T2 phase while the other phases are not found. In addition, dislocations are from excess vacancy during the annealing treatment and play important roles for the Moss precipitate. The dislocations can serve as the heterogeneous nucleation sites and compose of sub-boundary which refines the grain size to some extent. The results observed in this study can be used as a reference for future work on the relationships between microstructure and mechanical property of the Mo-Si-B alloys.

KW - Diffusion annealing treatment

KW - Microstructure

KW - Mo-Si-B alloys

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DO - 10.1016/j.ijrmhm.2009.12.002

M3 - 文章

AN - SCOPUS:77949492588

SN - 0263-4368

VL - 28

SP - 377

EP - 382

JO - International Journal of Refractory Metals and Hard Materials

JF - International Journal of Refractory Metals and Hard Materials

IS - 3

ER -

Microstructural characterization of Mo-12Si-8.5B alloy subjected to diffusion annealing treatment

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