巻号一覧
38 巻, 7 号
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カンメル ローランド, 岸 富也1987 年 38 巻 7 号 p. 273-278
発行日: 1987/07/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1018K) -
富岡 秀徳, 北村 英男, 上田 重朋1987 年 38 巻 7 号 p. 279-284
発行日: 1987/07/01
公開日: 2009/10/30
ジャーナル フリーDiffusion behavior in Au/Al thin film diffusion couples and the resulting compound formation was investigated by X-ray diffraction and Auger electron spectroscopy (AES). The Au/Al diffusion couples in which both films were of identical thichness were prepared by conventional vapor deposition technique. The couples were annealed at temperatures of 200-300°C, and reflectance from the films was measured in order to investigate changes in surface color.
(1) In Au/Al thin film diffusion couples annealed at 200-300°C, AuAl intermetallic compound was identified by X-ray diffraction as the end phase.
(2) AES depth profiles can be obtained from Au/Al thin film diffusion couples by measuring the height of Al (1396eV) and Au (2024eV) peaks. AES depth profile data indicate that the Au/Al alloy film becomes uniform in composition after annealing at 250°C for 120min.
(3) Diffusion and compound formation behavior of these thin film diffusion couples was also investigated by measuring the reflectance curves and it was found that the finer the grain size the faster the rate of compound formation.抄録全体を表示PDF形式でダウンロード (1943K) -
パルス電解法による非晶質Ni-Sめっき山川 宏二, 椿野 晴繁, 秋吉 浩一, 井上 博之, 吉本 勝利1987 年 38 巻 7 号 p. 285-289
発行日: 1987/07/01
公開日: 2009/10/30
ジャーナル フリーNickel containing from 12-41wt% of sulfur was plated by the pulse current method and the conventional DC method at various current densities in three baths-namely NiSO4-Na2S2O3 and NiCl2-Na2S2O3-. The morphology, sulfur content and structure of the Ni-S films were studied by SEM observation, EDX analysis and X-ray diffraction. The Ni-S films plated by pulse current plating were higher in sulfur content than those plated by the DC method, Films plated in baths containing Ni (SCN)2 had numerous cracks, while those plated in acidic baths containing Na2S2O3 had few cracks and adhered tightly to the substrate. Detailed X-ray diffraction patterns showed that films containing about 12wt% S consisted of microcrystalline alloy, while containing 32wt% S consisted of amorphous alloy.抄録全体を表示PDF形式でダウンロード (1894K) -
古郷 佐八郎, 荻野 春之助, 中川 隆, 小林 正孝, 浅見 克敏1987 年 38 巻 7 号 p. 290-295
発行日: 1987/07/01
公開日: 2009/10/30
ジャーナル フリーThe effectiveness of the TiN-plating of ductile iron castings=both as-cast and heat-treated=was examined by dry wear resistance tests. Observations of abraded surfaces and cross sections were conducted to determine the effect of TiN-plating on matrix structure and graphite and on the relationship to wear resistance.
TiN film of hardness of approximately HV 2500 was formed almost uniformly on the matrix and graphite. Wear resistance was much better for TiN-plated castings than for bare castings, and this remained true up to a sliding distance of 1km, regardless of the matrix structure.
The effect of TiN-plating was found to depend on the plastic deformation of the matrix. In the case of annealed castings of low hardness, plastic deformation of the matrix under the TiN film occurred readily, and the membrane exfoliated rapidly due to the formation of fine cracks. In the case of bainitized material of sufficient hardness on the other hand, plastic deformation rarely occurred, with the result that exfaliation appeared less frequently. This also prevented deformation and destruction of the graphite grains, and wear resistance was improved.抄録全体を表示PDF形式でダウンロード (3297K)
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