Nucleation of (Mo) precipitates on dislocations during annealing of a Mo-rich Mo5SiB2 phase

Nobuaki Sekido; Ridwan Sakidja; John H. Perepezko

Nucleation of (Mo) precipitates on dislocations during annealing of a Mo-rich Mo₅SiB₂ phase

Nobuaki Sekido, Ridwan Sakidja, John H. Perepezko

Research output: Contribution to journal › Conference article › peer-review

Abstract

Upon annealing an as-cast Mo-10Si-20B alloy at high temperatures, a Mo solid solution phase precipitates within a supersaturated Mo₅SiB ₂ phase. The precipitation behavior of the Mo solid solution was investigated by means of transmission electron microscopy and X-ray diffractometry. It is found that the Mo₅SiB₂ phase in a Mo-10Si-20B alloy contains a significant amount of structural vacancies in the as-cast state. The excess vacancies are removed to form dislocations during annealing, which provides the heterogeneous nucleation sites for the (Mo) precipitates.

Original language	English
Article number	S5.35
Pages (from-to)	321-326
Number of pages	6
Journal	Materials Research Society Symposium Proceedings
Volume	842
Publication status	Published - 2005 Aug 25
Externally published	Yes
Event	2004 MRS Fall Meeting - Boston, MA, United States Duration: 2004 Nov 29 → 2004 Dec 2

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Nucleation of (Mo) precipitates on dislocations during annealing of a Mo-rich Mo5SiB2 phase",

abstract = "Upon annealing an as-cast Mo-10Si-20B alloy at high temperatures, a Mo solid solution phase precipitates within a supersaturated Mo5SiB 2 phase. The precipitation behavior of the Mo solid solution was investigated by means of transmission electron microscopy and X-ray diffractometry. It is found that the Mo5SiB2 phase in a Mo-10Si-20B alloy contains a significant amount of structural vacancies in the as-cast state. The excess vacancies are removed to form dislocations during annealing, which provides the heterogeneous nucleation sites for the (Mo) precipitates.",

author = "Nobuaki Sekido and Ridwan Sakidja and Perepezko, {John H.}",

year = "2005",

month = aug,

day = "25",

language = "English",

volume = "842",

pages = "321--326",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "2004 MRS Fall Meeting ; Conference date: 29-11-2004 Through 02-12-2004",

}

TY - JOUR

T1 - Nucleation of (Mo) precipitates on dislocations during annealing of a Mo-rich Mo5SiB2 phase

AU - Sekido, Nobuaki

AU - Sakidja, Ridwan

AU - Perepezko, John H.

PY - 2005/8/25

Y1 - 2005/8/25

N2 - Upon annealing an as-cast Mo-10Si-20B alloy at high temperatures, a Mo solid solution phase precipitates within a supersaturated Mo5SiB 2 phase. The precipitation behavior of the Mo solid solution was investigated by means of transmission electron microscopy and X-ray diffractometry. It is found that the Mo5SiB2 phase in a Mo-10Si-20B alloy contains a significant amount of structural vacancies in the as-cast state. The excess vacancies are removed to form dislocations during annealing, which provides the heterogeneous nucleation sites for the (Mo) precipitates.

AB - Upon annealing an as-cast Mo-10Si-20B alloy at high temperatures, a Mo solid solution phase precipitates within a supersaturated Mo5SiB 2 phase. The precipitation behavior of the Mo solid solution was investigated by means of transmission electron microscopy and X-ray diffractometry. It is found that the Mo5SiB2 phase in a Mo-10Si-20B alloy contains a significant amount of structural vacancies in the as-cast state. The excess vacancies are removed to form dislocations during annealing, which provides the heterogeneous nucleation sites for the (Mo) precipitates.

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M3 - Conference article

AN - SCOPUS:23844557204

VL - 842

SP - 321

EP - 326

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

SN - 0272-9172

M1 - S5.35

T2 - 2004 MRS Fall Meeting

Y2 - 29 November 2004 through 2 December 2004

ER -