| Project/Area Number |
06650823
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Material processing/treatments
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| Research Institution | Fukui National College of Technology |
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Principal Investigator |
YASUMARU Naoki Fukui Natl. Coll. Tech., Department of Mechanical Engineering, Associate Professor, 機械工学科, 助教授 (90158006)
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| Co-Investigator(Kenkyū-buntansha) |
IDEHARA Toshitaka Fukui University, Department of Applied Physics, Professor, 工学部, 教授 (80020197)
TANAKA Shigetoshi Fukui Natl. Coll. Tech., President, 校長 (20025240)
OKIMURA Kunio Fukui Natl. Coll. Tech., Department of Electrical and Information Engineering, L, 電子情報工学科, 講師 (00194473)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1994: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | plasma treatment / nitriding / ceramic coating / surface treatment / duplex treatment |
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| Research Abstract |
(1) Production of Arc Ion Plating (AIP) system with high density plasma source
2.45 GHz microwave was introduced into the plasma port where the cusp-type magnet field was generated by utilizing a rare earth magnet through a quartz window. This plasma port was set up at an upper flange of a vacuum chamber of AIP equipment. In this chamber, the specmens were mounted on the stage which could be heated up to 600ﾟC and biased untill -1 kV.Plasma nitriding and ceramic coating were done in this system.
(2)Mechnical properties of duplex suraface treated steels
Nitride films of TiN (Hv2200) and CrN (Hv2000), carbide film of TiC (Hv3000), hyderide film of TiH_2 (Hv500), oxide film of TiO_2 (Hv1200) and diamond like carbon film of DLC (Hv2600) were examined in this study. The mechanical properties of the duplex treated steels are as follows. (1) TiN or CrN-coated specimens after plasma nitriding showed the best wear resistance even under a heavy load. (2) Ceramic films showed good resistance tocorrosion mostly. Especially, we found the corrosion current density of TiH_2 film is very small. (3) The fatigue limit of the duplex treated specimens increased largely compared to that of the untreated one. The quality of the nitrided layr is most effective according to the fatigue resistance.
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