窒素イオン注入したTi合金のトライボロジー特性 [in Japanese] Tribological Properties of Nitrogen Ion Implanted Ti Alloy [in Japanese]
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In order to investigate the mechanical properties of ion-implanted Ti alloy (Ti-6Al-4V), disk samples of Ti-6Al-4V were implanted with 200keV N<sub>2</sub><sup>+</sup> ions at doses of 2.5×10<sup>16</sup> to 5×10<sup>17</sup> ions/cm<sup>2</sup>. Tribological properties were evaluated with pin-on-disk tests. Bearing steel (SUJ2) balls 5mm in diameter were used as pins. Sliding conditions were as follows: load, 0.46N; speed, 0.04m/s; oil lubrication, SAE 7.5W-30.<br>Knoop hardness (load: 98mN) increased from Hk 356 to Hk 556 (dose: 5×10<sup>17</sup>ions/cm<sup>2</sup>) with ion dosage. The coefficient of friction of N<sub>2</sub><sup>+</sup> ion-implanted Ti-6Al-4V disks ranged from 0.1 to 0.2, values that were lower than 0.6 obtained for an unimplanted disk. N<sub>2</sub><sup>+</sup> ion implantation reduced wear on the pins as well as on the Ti-6Al-4V disks. The seizure load of N<sub>2</sub><sup>+</sup> ion-implanted disks increased with ion dosage.
- Jitsumu Hyomen Gijutsu
Jitsumu Hyomen Gijutsu 47(4), 345-348, 1996-04
The Surface Finishing Society of Japan