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  1. B200 工学部/工学研究科
  2. B200b 紀要
  3. Memoirs of the School of Engineering, Nagoya University
  4. 46(2)

Studies on the surface modification and measurements

https://doi.org/10.18999/memsenu.46.2.115
https://doi.org/10.18999/memsenu.46.2.115
32a77858-65b7-4d81-9dd7-344649dd1cf3
名前 / ファイル ライセンス アクション
46-2-01.pdf 46-2-01.pdf (2.4 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2020-10-23
タイトル
タイトル Studies on the surface modification and measurements
言語 en
著者 Oki, Takeo

× Oki, Takeo

WEKO 101819

en Oki, Takeo

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
内容記述
内容記述 At first, important points and trends of the development of the surface modification engineering were mentioned and discussed in terms of its application according to wear resistance, hardness and corrosion resistance etc.. Then by means of disproportionation reaction in molten salts, new surface modification process was studied in details. 1) Surface coating treatment by chemical transport using disproportionation reaction in molten salts was studied comprehensively. The metal such as Si, Cr, Ti, V, Zr, Ta and etc. was deposited to form alloy and compound coating on the surface by application of the disproportionation reaction in molten halide salts, KCl-BaCI[2]-NaF-Metal-Metal salts system. The overall reaction can be represented as follows. M(a[1] : in source) → M(a[2] : in metal or compounds) (a[1] > a[2]) Various films were coated on steels by this method: ferrosilicon and ferrosilicon-graphite composite, chromium carbide, titanium carbide, vanadium carbide, tantalum carbide and boride films of these metals. The surface hardness (Hv) of these films ranged from 1000 to 3000 and they had very high wear resistance. 2) The formation of some functional carbide films and alloy ones were performed on some substrates like steels by immersing substrates into such molten salts system as KCl(-NaCl)-BaCl[2]-NaF-Metal powder-Metal oxide or halide. These formation reactions of films is a disproportionation reaction which is proceeded through the difference of metal activities between in source and in films. Total reaction is as follows: M(a[s] , in source) → M(a[c] , in ceramics or alloy as products) (a:activity, a[s] > a[c] ) This paper represents the mechanisms and characteristics of some ceramic films, such as boride, nitride and silicide film as the progress and application of surface modification by disproportionation reaction. As though substrates for this investigation don't have any component elements of films, they can be formed on substrate by multifold processes using each disproportionation reaction in molten salts, respectively. These films were submitted to various inspections such as X-ray analysis, microscopic observation, EPMA and corrosion test. They were excellent at tests of surface hardness, wear resistance and corrosion resistance.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 School of Engineering, Nagoya University
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ID登録
ID登録 10.18999/memsenu.46.2.115
ID登録タイプ JaLC
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0919-0805
書誌情報 en : Memoirs of the School of Engineering, Nagoya University

巻 46, 号 2, p. 115-146, 発行日 1995-03-31
著者版フラグ
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