イオンプレーティング金、銀膜の摩擦、摩耗特性に関する研究

• Material Type: 文書・図像類
• Title: イオンプレーティング金、銀膜の摩擦、摩耗特性に関する研究
• Author/Editor: 宮川, 行雄; 西村, 允; 野坂, 正隆; 宮脇, 雄三; MIYAKAWA, Yukio; NISHIMURA, Makoto; NOSAKA, Masataka; MIYAWAKI, Yuzo
• Author Heading: 宮川, 行雄; 西村, 允; 野坂, 正隆; 宮脇, 雄三; MIYAKAWA, Yukio; NISHIMURA, Makoto; NOSAKA, Masataka; MIYAWAKI, Yuzo
• Publication, Distribution, etc.: 航空宇宙技術研究所
• Publication Date: 1977-07
• Publication Date (W3CDTF): 1977-07
• Alternative Title: Study on Friction and Wear Performance of Ion-Plated Gold and Silver Films
• Periodical title: 航空宇宙技術研究所報告 = Technical Report of National Aerospace Laboratory TR-505
• No. or year of volume/issue: 505
• Volume: 505
• Pages: 101-
• ISSN (Periodical Title): ISSN : 0389-4010
• Text Language Code: jpn
• Target Audience: 一般
• Note (General): The sliding friction properties of gold and silver films deposited by ion plating, with varying depositing conditions, were examined under various conditions and compared with those of vacuum-evaporated and sputtered films. The ion plating apparatus used in this experiment was basically a diode system consisting of two electrodes. Pin-on-disk type friction testers were used in the sliding tests. The experiments were also carried out to clarify the running performance of angular contact ball bearings(type #7204C) lubricated by ion-plated gold and silver films. The main results obtained are as follows. (1)The throwing power of ion plating is caused by the scattering of the evaporated particles through collision with argon stoms, rather than by the movement of the evaporated metal ions through an electrical field. (2)The throwing power of ion plating depends on the evaporating velocity of plating metal, the distance between two electrodes, the applied negative potential and the argon pressure. The high throwing power is obtained at the evaporating velocity of 10-15 mg/s, with an interval between the two electrodes of 120mm, an applied potential of 4 kV and at an argon pressure of 5×10(exp -2) Torr for gold, and 2×10(exp -2) Torr for silver. (3)In ion plating, vacuum evaporation and sputtering, the adhesive strength of a film to substrate metal vitally dependent on the temperature of the substrate surface during film deposition. Film wear life becomes maximum at the particular temperature of the substrate surface. (4)The plating metal in ion plating has a higher kinetic energy value than those of vacuum evaporation and sputtering. Therefore the ion-plated film should provide far better lubrication performance than vacuum-evaporated and sputtered performance. Nevertheless, vacuum-evaporated film exhibited the best lubrication performance, ion-plated second and sputtered third; all three deposits made under optimum conditions. This result indicates that the adhesive strength of a film depends primarily on the temperature of the substrate surface during depositing the film, rather than the kinetic energy of the plating metal. Therefore, the merit of ion plating is to provide good adhesion of a film to a substrate metal close to that of vacuum-evaporation, and high throwing power. (5)The sliding friction properties of gold film are markedly affected by the sliding metal combination; effective lubrication of gold takes place, when adherence between gold and substrate metal is strong, but adhesion between gold and rider metal is weak. On the other hand, the influence of the sliding metal combination on silver film is relatively small. (6)Both gold and silver films in a vacuum provide far better performance than in air. However, the atomospheric influence on a silver film is more remarkable than on a gold film. Silver film exhibited a higher friction and shorter wear live in air than gold. On the other hand, friction in a vacuum was as low as that of gold film, and did not rupture even after 10(exp 5) times repeated traverse, while gold film exhibited an endurance live of 2×10(exp 3) repetitions. (7)Wear life of gold film increases with an increase in relative humidity in air and reaches maximum in the relative humidity range of 20-50%. Above 60%, wear life gradually decreases. (8)The temperature limit of gold and silver lubrication using steel as the substrate metal was about 200C. Prevention of diffusion is necessary to produce effective lubrication above 200C. (9)When gold and silver film was applied to the ball bearings, the bearings with a cage ceased to operate in a short time due to film wear. Ball bearings with a full component of SUJ 2 races and gold or silver plated SUJ 2 balls exhibited the best lubrication performance. (10)In air and a vacuum, the longest running time to failure of the full type ball bearings lubricated by gold was about 1500 hours at a revolutional speed of 2000 rpm under a thrust load of 1 Kg. However, reliability was poor. Moreover, running time to failure in a vacuum decreases markedly as the revolutional speed increases from 2000 to 3000 rpm. (11)The full type ball bearings lubricated by silver provided very short runnig time in air; only several hours. On the other hand, the running time in a vacuum was much longer than gold, and reliability was good. No break in the silver film on the balls was found even after a total 800 hours operation at a speed of 2000, 3000 and 4000 rpm.; 資料番号: NALTR0505000; レポート番号: NAL TR-505
• Access Restrictions: 限定公開
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ