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

被引：18

作者：

Lim, Jae-Won ^{[1
]}

Mimura, Kouji ^{[2
]}

Miyawaki, Dai ^{[2
]}

Oh, Jung-Min ^{[1
]}

Choi, Good-Sun ^{[1
]}

Kim, Sang-Bae ^{[1
]}

Uchikoshi, Masahito ^{[2
]}

Isshiki, Minoru ^{[2
]}

机构：

[1] Korea Inst Geosci & Mineral Resources, Mineral Resources Res Div, Taejon 305350, South Korea

[2] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

MATERIALS LETTERS | 2010年 / 64卷 / 21期

关键词：

Metals and alloys; Metallurgy; Molybdenum; Impurity; Hydrogen plasma arc melting; Glow discharge mass spectrometry; REMOVAL; MOLYBDENUM; REDUCTION; TANTALUM;

D O I：

10.1016/j.matlet.2010.07.067

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The refining effect of Ar/Ar-H-2 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-H-2 PAM down to a few mass ppm levels, and the purities of respective Mo metals refined by Ar/Ar-20%H-2 PAM were improved up to 4N(99.9943%) and 5N(99.9996%). It is also found that Ar-H-2 PAM provides excellent decarburization, deoxidation, and denitrogenization. This confirmed that the refining effect is chemically induced by activated hydrogen atoms during Ar-H-2 PAM. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2290 / 2292

页数：3

共 15 条

[1] PREPARATION AND CHARACTERIZATION OF HIGH-PURITY MOLYBDENUM SINGLE-CRYSTALS [J].

CAPP, DJ ;

EVANS, HW ;

EYRE, BL .

JOURNAL OF THE LESS-COMMON METALS, 1975, 40 (01) :9-20

[2] Impurity removal from Zr, Nb and Ta metals by hydrogen plasma arc melting and thermodynamic estimation of hydride formation [J].

Elanski, D ;

Lim, JW ;

Mimura, K ;

Isshiki, M .

JOURNAL OF ALLOYS AND COMPOUNDS, 2006, 413 (1-2) :251-258

[3] REDUCTION OF METAL EVAPORATION LOSSES BY INERT-GAS ATMOSPHERES [J].

FROMM, E .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1978, 9 (12) :1835-1838

[4] Formation of Mo gate electrode with adjustable work function on thin Ta2O5 high-k dielectric films [J].

Juang, MH ;

Lin, TY ;

Jang, SL .

SOLID-STATE ELECTRONICS, 2006, 50 (02) :114-118

[5]

KANEKO K, 1976, TETSU TO HAGANE, V62, P43

[6]

KANEKO K, 1976, J IRON STEEL I JPN, V62, P43

[7] Purity evaluation of Ta metal refined by Ar/Ar-H2 plasma arc melting [J].

Lim, Jae-Won ;

Choi, Good-Sun ;

Mimura, Kouji ;

Isshiki, Minoru .

METALS AND MATERIALS INTERNATIONAL, 2008, 14 (04) :539-543

[8] REMOVAL OF COPPER AND TIN IN THE MOLTEN STEEL WITH PLASMA FLAME [J].

MATSUO, T .

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 1989, 75 (01) :82-88

[9]

MATSUO T, 1985, J IRON STEEL I JPN, V71, pS135

[10]

Mimura K, 2002, SPR S MAT PROC, P181

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