Tribological Properties of Nano-structured Titania

纳米结构二氧化钛的摩擦学性能

• 批准号: 09650163
• 负责人: IWAI Yoshiro
• 金额: $ 1.86万
• 依托单位: Fukui University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650163/
• 关键词: 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

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.

采用低温高压烧结法制备的纳米晶TiO 2陶瓷（晶粒尺寸<100 nm）和等离子烧结法制备的纳米晶TiO 2陶瓷，在室温下进行了大范围接触载荷和滑动速度下的块-环滑动磨损试验。块试样为TiO 2，环材料为轴承钢。获得了以下结果。(1)从晶粒尺寸和手感的角度讨论了在不同烧结条件（压力0.5-1.5GPa，温度400-500 ℃）下制备的纳米TiO_2的摩擦学性能。n-TiO_2的体积损失随烧结压力的增加而减小，并与样品的密度、晶粒尺寸和金红石相含量有关。(2)对于等离子烧结法制备的TiO_2陶瓷，在v= 10 m/s ~（-1）范围内，磨损率随滑动速度的增加而增加，但在较高的滑动速度下，磨损率又降低。它随负载单调增加。在v=0.1m/s时，TiO 2陶瓷的耐磨性优于Al 2 O3和SiC陶瓷。TiO 2陶瓷的摩擦学性能取决于热应力引起的脆性断裂。基于这些结果，可以预期纳米结构的TiO 2陶瓷将在高级摩擦应用中发挥重要作用。

项目成果

Y.Iwai: "Wear properties of nano-structured titania" Proc.of CIMTEC '98. (in press). (1999)

Y.Iwai：“纳米结构二氧化钛的磨损特性”Proc.of CIMTEC 98。

竹下晋正: "抵抗ろう接したTi-10mass%Zr合金継手の引張強さに及ぼす急速冷却の影響" 日本金属学会誌. 61・11. 1260-1267 (1997)

Shinmasa Takeshita：“快速冷却对电阻钎焊 Ti-10mass%Zr 合金接头拉伸强度的影响”，日本金属学会杂志 61・11（1997 年）。

Y.Iwai, M.Wada, T.Honda, K.D.Pae, S-C Liao, W.E.Mayo: "Wear properties of nano-structured titania" Proc.of CIMTEC'98. (in press). (1999)

Y.Iwai、M.Wada、T.Honda、K.D.Pae、S-C Liao、W.E.Mayo：“纳米结构二氧化钛的磨损性能”Proc.of CIMTEC98。

Y.Iwai: "Wear properties of nano-structured titania" Proc.of CIMTEC'98. in press. (1999)

Y.Iwai：“纳米结构二氧化钛的磨损特性”Proc.of CIMTEC98。

竹下晋正・坂本智: "抵抗ろう接したTi-10mass%Zr合金継手の引張強さに及ぼす急速・冷却の影響" 日本金属学会誌. 61・11. 1260-1267 (1997)

Shinmasa Takeshita 和 Satoshi Sakamoto：“快速冷却对电阻钎焊 Ti-10mass%Zr 合金接头拉伸强度的影响”，日本金属学会杂志 61・11（1997 年）。