Preparation of niobium disilicide coating by heating niobium in a sodiumsilicon melt

Takahiro Yamada; Hiroto Sato; Hisanori Yamane

doi:10.2320/matertrans.MAW201213

Preparation of niobium disilicide coating by heating niobium in a sodiumsilicon melt

Takahiro Yamada, Hiroto Sato, Hisanori Yamane

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

A Niobium disilicide (NbSi₂) layer was formed at the surface of Nb plates by heating those plates with Si powder and a piece of Na at 10001200K for 148 h. The thickness of the NbSi₂ layer increased to 129μm with increasing temperature and in proportion to the square root of the heating time. The activation energy of the NbSi₂ layer formation evaluated from the Arrhenius plot of parabolic growth constants was 160 kJ mol ^-1. NbSi₂-coated Nb plates retained their shapes after heating at 11001700K for 10 h in air. Oxidation of the inner Nb of the plates was prevented.

Original language	English
Pages (from-to)	2141-2144
Number of pages	4
Journal	Materials Transactions
Volume	53
Issue number	12
DOIs	https://doi.org/10.2320/matertrans.MAW201213
Publication status	Published - 2012

Keywords

Coatings
Niobium
Niobium disilicide
Oxidation resistance
Sodium flux

ASJC Scopus subject areas

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

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10.2320/matertrans.MAW201213

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title = "Preparation of niobium disilicide coating by heating niobium in a sodiumsilicon melt",

abstract = "A Niobium disilicide (NbSi2) layer was formed at the surface of Nb plates by heating those plates with Si powder and a piece of Na at 10001200K for 148 h. The thickness of the NbSi2 layer increased to 129μm with increasing temperature and in proportion to the square root of the heating time. The activation energy of the NbSi2 layer formation evaluated from the Arrhenius plot of parabolic growth constants was 160 kJ mol -1. NbSi2-coated Nb plates retained their shapes after heating at 11001700K for 10 h in air. Oxidation of the inner Nb of the plates was prevented.",

keywords = "Coatings, Niobium, Niobium disilicide, Oxidation resistance, Sodium flux",

author = "Takahiro Yamada and Hiroto Sato and Hisanori Yamane",

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doi = "10.2320/matertrans.MAW201213",

language = "English",

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pages = "2141--2144",

journal = "Materials Transactions",

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T1 - Preparation of niobium disilicide coating by heating niobium in a sodiumsilicon melt

AU - Yamada, Takahiro

AU - Sato, Hiroto

AU - Yamane, Hisanori

PY - 2012

Y1 - 2012

N2 - A Niobium disilicide (NbSi2) layer was formed at the surface of Nb plates by heating those plates with Si powder and a piece of Na at 10001200K for 148 h. The thickness of the NbSi2 layer increased to 129μm with increasing temperature and in proportion to the square root of the heating time. The activation energy of the NbSi2 layer formation evaluated from the Arrhenius plot of parabolic growth constants was 160 kJ mol -1. NbSi2-coated Nb plates retained their shapes after heating at 11001700K for 10 h in air. Oxidation of the inner Nb of the plates was prevented.

AB - A Niobium disilicide (NbSi2) layer was formed at the surface of Nb plates by heating those plates with Si powder and a piece of Na at 10001200K for 148 h. The thickness of the NbSi2 layer increased to 129μm with increasing temperature and in proportion to the square root of the heating time. The activation energy of the NbSi2 layer formation evaluated from the Arrhenius plot of parabolic growth constants was 160 kJ mol -1. NbSi2-coated Nb plates retained their shapes after heating at 11001700K for 10 h in air. Oxidation of the inner Nb of the plates was prevented.

KW - Coatings

KW - Niobium

KW - Niobium disilicide

KW - Oxidation resistance

KW - Sodium flux

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JO - Materials Transactions

JF - Materials Transactions

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Preparation of niobium disilicide coating by heating niobium in a sodiumsilicon melt

Abstract

Keywords

ASJC Scopus subject areas

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