著者

佐伯 功 木村 豪志 春木 佳奈 佐藤 忠夫

出版者

一般社団法人 表面技術協会

雑誌

表面技術 (ISSN:09151869)

巻号頁・発行日

vol.62, no.12, pp.717, 2011 (Released:2012-09-22)

参考文献数

13

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This study examined Ni-P electroplating with saccharin sodium salt. Hardness of the deposited films increased concomitantly with increasing concentration of the saccharin sodium salt in the plating bath. It reached Hvm = 822 at the concentration of 8.3 mol m−3. Crystallites in the films were too small to account for film hardening by the Hall-Petch mechanism.

著者

佐藤 忠夫 堀米 毅 上田 幹人

出版者

The Surface Finishing Society of Japan

雑誌

表面技術 (ISSN:09151869)

巻号頁・発行日

vol.51, no.6, pp.640-645, 2000-06-01 (Released:2009-10-30)

参考文献数

10

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TiB2 and TiN films were coated by chemical vapor deposition on SKD 61 steel to improve the corrosion resistivity of a diecasting machine in a melted aluminum alloy. The protectivity of the film in the melted aluminum alloy was examined by an immersion test at 900°C and a thermal cycle test between room temperature and 900°C. TiN film, which serves as a binder, greatly improves the adhesion of TiB2 film on the steel substrate. The thermal cycle test indicated that the optimum thickness of TiB2 and TiN layers is at 4 and 6μm, respectively. Compared to ion-nitrized steel, steel coated by TiB2/TiN exhibits significantly higher degree of corrosion resistivity.

著者

三上 博史 周 伝久 高橋 千一郎 佐藤 忠夫 嶋影 和宜

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.110, no.4, pp.313-318, 1994

被引用文献数

2

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Vanadium diboride (VB<SUB>2</SUB>) film has been synthesized on mild steel and transparent quartz substrates by CVD method, which was carried out at the temperature range of 1073 to 1223K with the hydrogen reduction of VOCl<SUB>3</SUB>-BCl<SUB>3</SUB> mixture under the chemical erquivalent ratio regions of 10 to 40 for H<SUB>2</SUB>-VOCl<SUB>3</SUB> gases and of 40 to 120 for H<SUB>2</SUB>-BCl<SUB>3</SUB> gases. VB<SUB>2</SUB> film involving both Fe<SUB>2</SUB>B and FeB was synthesized on a mild steel substrate because a mild steel plate was borided with BCl<SUB>3</SUB> gas. On the other hand, pure VB<SUB>2</SUB> layer film was prepared on a transparent quartz substrate atthe temperature above 1173K. Futhermore, VB<SUB>2</SUB> film having high orientation and crystallization could not be prepared on a mild steel substrate. However, smooth surface VB<SUB>2</SUB> film having high crystallization and micro-vickers hardness of about 2800Hmv could be synthesized on a transparent quartz substrate at the temperature of 1173K under the conditions of chemical equivalent ratio of 40 for H<SUB>2</SUB>-VOCl<SUB>3</SUB> gases and of 80 for H<SUB>2</SUB>-BCl<SUB>3</SUB> gases.

著者

佐藤 忠夫 堀米 毅 上田 幹人

出版者

The Surface Finishing Society of Japan

雑誌

表面技術 = The Journal of the Surface Finishing Society of Japan (ISSN:09151869)

巻号頁・発行日

vol.51, no.6, pp.640-645, 2000-06-01

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TiB₂ and TiN films were coated by chemical vapor deposition on SKD 61 steel to improve the corrosion resistivity of a diecasting machine in a melted aluminum alloy. The protectivity of the film in the melted aluminum alloy was examined by an immersion test at 900°C and a thermal cycle test between room temperature and 900°C. TiN film, which serves as a binder, greatly improves the adhesion of TiB₂ film on the steel substrate. The thermal cycle test indicated that the optimum thickness of TiB₂ and TiN layers is at 4 and 6μm, respectively. Compared to ion-nitrized steel, steel coated by TiB₂/TiN exhibits significantly higher degree of corrosion resistivity.