ผลของปริมาณทองแดงต่อความแข็งและการต้านทานการสึกหรอของโลหะผสมไทเทเนียม-ทองแดงที่อบเผาผนึก
Titanium is a metal with high strength to weight ratio. It has a good corrosion resistance because of existence of oxide film similar to aluminum; therefore, it is safe to be used as artificial bones or artificial tooth. However, pure titanium may have insufficient wear resistance. Addition of coppe...
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| Format: | Theses and Dissertations |
| Language: | Thai |
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จุฬาลงกรณ์มหาวิทยาลัย
2010
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| Online Access: | https://digiverse.chula.ac.th/Info/item/dc:43727 |
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| Institution: | Chulalongkorn University |
| Language: | Thai |
| Summary: | Titanium is a metal with high strength to weight ratio. It has a good corrosion resistance because of existence of oxide film similar to aluminum; therefore, it is safe to be used as artificial bones or artificial tooth. However, pure titanium may have insufficient wear resistance. Addition of copper to titanium will improve its wear property. This research studies effect of amount of added copper, compaction pressure, temperature and time during sintering to the relative density and mechanical properties of the alloys which are hardness and wear resistance. In addition, effect of solution treatment to the aforementioned properties will be studied. Titanium-copper alloys compositions to be investigated are 2, 4, 7, 10, 15wt.% copper. From the study, it was found that addition of copper reduces relative density of sintered materials, especially when copper is increased from 10 to 15wt.%. Increase of compaction pressure, temperature and time of sintering increases the relative density. The results show that a compaction pressure of 254 MPa, sintering at 1100℃ for 4 hours will give high values of relative density and hardness. The Ti-2Cu and Ti-10Cu alloys have highest relative density and hardness of 96% and 376 HV, respectively. These alloys are chosen to be solution heat treated. After solution treatment at 1000℃ for 0.5 hour, it was found that hardness values are increased. Maximum hardness of 526 HV is obtained in Ti-10Cu alloy. Wear test by measuring loss shows that Ti-10Cu alloy sintered at 1100℃ for 4 hours has lowest mass loss of 36.4 mg, which is equivalent to specific wear rate of 1.01x10⁻¹³ m³/N-m. |
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