| Project/Area Number |
09650163
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
設計工学・機械要素・トライボロジー
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| Research Institution | Fukui University |
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Principal Investigator |
IWAI Yoshiro Fukui Unive., Mech.Eng.Dept., Professor, 工学部, 教授 (40115291)
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| Co-Investigator(Kenkyū-buntansha) |
HONDA Tomomi Fukui Univ., Mech.Eng.Dept., Associate Prof., 工学部, 助教授 (80251982)
TAKESHITA Kunimasa Fukui Univ., Mech.Eng.Dept., Associate Prof., 工学部, 助教授 (50126637)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1998: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1997: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | TiO2 / Titania / Nano-structure / Tribology / Wear property / Grain size / Wear mechanism / Tribo-application / 高温かたさ / TiO_2セラミックス / 開気孔 / トライボ膜 |
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| Research Abstract |
Nanocrystalline TiO2 ceramic which was produced by sintering under high-pressure and low temperature (grain size<100nm) and TiO2 ceramic produced by plasma sintering technique were studied by the block-on-ring sliding wear tests under the wide range of contact load and the sliding velocity in room air. A block specimen was TiO2 and a ring material was bearing steel. The following results were obtained.
(1) The tribological properties of nanociystalline TiO2 which was manufactured under various sintering conditions (pressure of 0.5-1.5GPa and temperature of 400-500ﾟC) were discussed from the view points of grain size and handness. The volume loss of n-TiO2 was found to decrease with sintering pressure, and was also related to the density, the grain size and the % rutile phase in the samples.
(2) For TiO2 ceramic produced by plasma sintering technique, the wear rate increases with sliding velocity until v=10m/s -but then decreases at high velocity. It increases monotonously with load. TiO2 ceramic shows high wear resistance compared with A1203 and SiC under v=0.1m/s. The tribological properties of TiO2 ceramic depend on the brittle fracture caused by thermal stress. Based on these results, it is expected that nano-structured TiO2 ceramic will play an important role in advanced tribo-applications.
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