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Ni-Ti(-Zr)-P非晶合金的熱穩(wěn)定性及腐蝕行為
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Thermal Stability and Corrosion Behavior of Ni-Ti(-Zr)-P Glassy Alloys
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    摘要:

    采用熔體旋淬法制備了Ni76Ti5P19和Ni73Ti5Zr3P19 (at%)非晶合金，對(duì)其熱穩(wěn)定性及腐蝕行為進(jìn)行了研究，并討論了Zr元素的添加對(duì)Ni-Ti-P非晶合金性能的影響。結(jié)果表明，Zr元素的添加提高了Ni76Ti5P19非晶合金的玻璃轉(zhuǎn)變溫度（Tg）和晶化溫度（Tx），但使得過冷液體溫度區(qū)間（ΔTx）有所降低。電化學(xué)實(shí)驗(yàn)表明，在NaCl、HCl和H2SO4溶液中，Ni-Ti(-Zr)-P非晶合金發(fā)生自鈍化，具有良好的耐腐蝕性能，這可能歸因于合金表面Ti/Zr和P元素的富集。在同一溶液中，與Ni76Ti5P19非晶合金相比，Ni73Ti5Zr3P19非晶合金具有較高的開路電位和較低的鈍化電流密度。在Ni-Ti-P合金中添加元素Zr以替代部分Ni能夠在鈍化膜中引入ZrO2，從而提高合金表面氧化膜的保護(hù)性，改善合金的耐腐蝕能力

    Abstract:

    Ni76Ti5P19 and Ni73Ti5Zr3P19 (at%) metallic glasses were prepared by a melt-spinning technique. Their thermal stability and corrosion behaviors were investigated, and the effects of Zr addition on the properties of the Ni-Ti-P glassy alloy were discussed. Results show that Zr addition increases the glass transition temperature (Tg) and crystallization temperature (Tx) of the Ni76Ti5P19 glassy alloy, and decreases its supercooled liquid region (ΔTx). Electrochemical tests in NaCl, HCl and H2SO4 solutions indicate passivation behavior of the Ni-Ti(-Zr)-P metallic glasses. Their good corrosion resistance can be attributed to the formation of a protective Ti/Zr- and phosphorus-rich layer on the surface of the alloys. Compared with Ni76Ti5P19 glassy alloy, the Ni73Ti5Zr3P19 glassy alloy exhibits higher open-circuit potential and lower passive current density. Partially replacing Ni with Zr in Ni-Ti-P alloy introduces ZrO2 in the passive film, which improves the protection of the surface film and results in a higher corrosion resistance

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邱春龍,黃 璐,盧旭陽,廖 琦,逄淑杰,張 濤. Ni-Ti(-Zr)-P非晶合金的熱穩(wěn)定性及腐蝕行為[J].稀有金屬材料與工程,2013,42(5):975~978.[Qiu Chunlong, Huang Lu, Lu Xuyang, Liao Qi, Pang Shujie, Zhang Tao. Thermal Stability and Corrosion Behavior of Ni-Ti(-Zr)-P Glassy Alloys[J]. Rare Metal Materials and Engineering,2013,42(5):975~978.]
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  • 收稿日期:2012-05-15
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