Hydrogen effect on refining of Mo metal by Ar-H2 plasma arc melting

Jae Won Lim; Kouji Mimura; Dai Miyawaki; Jung Min Oh; Good Sun Choi; Sang Bae Kim; Masahito Uchikoshi; Minoru Isshiki

doi:10.1016/j.matlet.2010.07.067

Hydrogen effect on refining of Mo metal by Ar-H₂ plasma arc melting

Jae Won Lim, Kouji Mimura, Dai Miyawaki, Jung Min Oh, Good Sun Choi, Sang Bae Kim, Masahito Uchikoshi, Minoru Isshiki

IMRAM - Collaborative Research Division of Non-ferrousMetallurgy and Environmental Science

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

19 Citations (Scopus)

Abstract

The refining effect of Ar/Ar-H₂ plasma arc melting (PAM) was investigated and the purity of Mo metals was evaluated by glow discharge mass spectrometry (GDMS). Most impurities in the Mo metals except for W were removed by Ar/Ar-H₂ PAM down to a few mass ppm levels, and the purities of respective Mo metals refined by Ar/Ar-20%H₂ PAM were improved up to 4N(99.9943%) and 5N(99.9996%). It is also found that Ar-H₂ PAM provides excellent decarburization, deoxidation, and denitrogenization. This confirmed that the refining effect is chemically induced by activated hydrogen atoms during Ar-H₂ PAM.

Original language	English
Pages (from-to)	2290-2292
Number of pages	3
Journal	Materials Letters
Volume	64
Issue number	21
DOIs	https://doi.org/10.1016/j.matlet.2010.07.067
Publication status	Published - 2010 Nov 15

Keywords

Glow discharge mass spectrometry
Hydrogen plasma arc melting
Impurity
Metallurgy
Metals and alloys
Molybdenum

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10.1016/j.matlet.2010.07.067

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title = "Hydrogen effect on refining of Mo metal by Ar-H2 plasma arc melting",

abstract = "The refining effect of Ar/Ar-H2 plasma arc melting (PAM) was investigated and the purity of Mo metals was evaluated by glow discharge mass spectrometry (GDMS). Most impurities in the Mo metals except for W were removed by Ar/Ar-H2 PAM down to a few mass ppm levels, and the purities of respective Mo metals refined by Ar/Ar-20%H2 PAM were improved up to 4N(99.9943%) and 5N(99.9996%). It is also found that Ar-H2 PAM provides excellent decarburization, deoxidation, and denitrogenization. This confirmed that the refining effect is chemically induced by activated hydrogen atoms during Ar-H2 PAM.",

keywords = "Glow discharge mass spectrometry, Hydrogen plasma arc melting, Impurity, Metallurgy, Metals and alloys, Molybdenum",

author = "Lim, {Jae Won} and Kouji Mimura and Dai Miyawaki and Oh, {Jung Min} and Choi, {Good Sun} and Kim, {Sang Bae} and Masahito Uchikoshi and Minoru Isshiki",

note = "Funding Information: This research was supported by the General Research Project of the Korea Institute of Geoscience and Mineral Resources (KIGAM) funded by the Ministry of Knowledge Economy of Korea .",

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doi = "10.1016/j.matlet.2010.07.067",

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AU - Lim, Jae Won

AU - Mimura, Kouji

AU - Miyawaki, Dai

AU - Oh, Jung Min

AU - Choi, Good Sun

AU - Kim, Sang Bae

AU - Uchikoshi, Masahito

AU - Isshiki, Minoru

N1 - Funding Information: This research was supported by the General Research Project of the Korea Institute of Geoscience and Mineral Resources (KIGAM) funded by the Ministry of Knowledge Economy of Korea .

PY - 2010/11/15

Y1 - 2010/11/15

N2 - The refining effect of Ar/Ar-H2 plasma arc melting (PAM) was investigated and the purity of Mo metals was evaluated by glow discharge mass spectrometry (GDMS). Most impurities in the Mo metals except for W were removed by Ar/Ar-H2 PAM down to a few mass ppm levels, and the purities of respective Mo metals refined by Ar/Ar-20%H2 PAM were improved up to 4N(99.9943%) and 5N(99.9996%). It is also found that Ar-H2 PAM provides excellent decarburization, deoxidation, and denitrogenization. This confirmed that the refining effect is chemically induced by activated hydrogen atoms during Ar-H2 PAM.

AB - The refining effect of Ar/Ar-H2 plasma arc melting (PAM) was investigated and the purity of Mo metals was evaluated by glow discharge mass spectrometry (GDMS). Most impurities in the Mo metals except for W were removed by Ar/Ar-H2 PAM down to a few mass ppm levels, and the purities of respective Mo metals refined by Ar/Ar-20%H2 PAM were improved up to 4N(99.9943%) and 5N(99.9996%). It is also found that Ar-H2 PAM provides excellent decarburization, deoxidation, and denitrogenization. This confirmed that the refining effect is chemically induced by activated hydrogen atoms during Ar-H2 PAM.

KW - Glow discharge mass spectrometry

KW - Hydrogen plasma arc melting

KW - Impurity

KW - Metallurgy

KW - Metals and alloys

KW - Molybdenum

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SP - 2290

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JO - Materials Letters

JF - Materials Letters

IS - 21

ER -

Hydrogen effect on refining of Mo metal by Ar-H₂ plasma arc melting

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Keywords

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