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| 篇名 | 不同表面改質對Ti-15V-3Al-3Sn-3Cr合金在700~900℃之高溫氧化研究 |
|---|---|
| 卷期 | 25:1 |
| 並列篇名 | Effect of Surface Modifications on High-temperature Oxidation of Ti-15V-3Al-3Sn-3Cr Alloy at 700~900℃ |
| 作者 | 林哲綸 、 廖崇閔 、 開物 |
| 頁次 | 009-018 |
| 關鍵字 | 表面改質 、 氧化動力學 、 拋物線律 、 NiO 、 TiO₂ 、 α-Al₂O₃ 、 NiAl₂O₄ 、 Surface modification 、 Oxidation kinetics 、 Parabolic rate law 、 EI |
| 出刊日期 | 201103 |
中文摘要
本研究主要探討2 種不同的表面改質包括熱浸鋁矽後電鍍Ni 改質(Ti-15-3(HN))及表面電鍍Ni 加滲Al 後再重覆鍍Ni 滲Al 改質(Ti-15-3(NANA))對Ti-15V-3Al-3Sn-3Cr(Ti-15-3)
合金在700 ~ 900 °C 空氣條件下之高溫氧化行為的影響。由研究結果得知，Ti-15-3(HN)在
700 ~ 900 °C 下之氧化動力學遵守拋物線律，而Ti-15-3 (NANA)在700 ~ 900 °C 下遵守拋物線律；但在900 °C 約3 小時後之氧化動力學有加速增重的趨勢。Ti-15-3(HN)在700 ~ 900 °C時表面生成的氧化物為NiO，但在基材與鍍層之間有裂縫，以至於產生TiO2 氧化物，促使了氧化速率增快，反之Ti-15-3(NANA)在700 ~ 800 °C 時生成具有保護性之α-Al2O3；但在900 °C 時，卻生成TiO2 及少量的α-Al2O3 和NiAl2O4。
英文摘要
The effects of two different surface modifications, hot dipping in Al-Si followed by electroplating of Ni (Ti-15-3(HN)) and double pre-Ni plating followed by aluminizing coating (Ti-15-3(NANA)) on the high temperature oxidation behavior of Ti-15V-3Al-3Sn-3Cr(Ti-15-3) alloys were studied over the temperature range of 700 ~ 900 °C in air. The results showed that the oxidation kinetics of Ti-15-3(HN) followed the parabolic-rate law at 700 ~ 900 °C. The oxidation kinetics of Ti-15-3(NANA) also followed the parabolic-rate law at 700 ~ 900 °C, but a significant
increase in mass gain was observed after oxidation at 900 °C for 3h. The scales having formed on the surface of Ti-15-3(HN) primarily consisted of NiO, but TiO2 formed between the substrate and the coating and enhanced the oxidation rate. On the other hand, the scales having formed on the
Ti-15-3(NANA) were protective α-Al2O3 at 700 ~ 800 °C, but TiO2, α-Al2O3 and NiAl2O4 formed instead at 900 °C.