采用熔体旋淬法制备了Ni76Ti5P19和Ni73Ti5Zr3P19 (at％)非晶合金,对其热稳定性及腐蚀行为进行了研究,并讨论了Zr元素的添加对Ni-Ti-P非晶合金性能的影响.结果表明,Zr元素的添加提高了Ni76Ti5P19非晶合金的玻璃转变温度(Tg)和晶化温度(Tx),但使得过冷液体温度区间(△Tx有所降低.电化学实验表明,在NaC1、HC1和H2SO4溶液中,Ni-Ti(-Zr)-P非晶合金发生自钝化,具有良好的耐腐蚀性能,这可能归因于合金表面Ti/Zr和P元素的富集.在同一溶液中,与Ni76Ti5P19非晶合金相比,Ni73Ti5Zr3P19非晶合金具有较高的开路电位和较低的钝化电流密度.在Ni-Ti-P合金中添加元素Zr以替代部分Ni能够在钝化膜中引入ZrO2,从而提高合金表面氧化膜的保护性,改善合金的耐腐蚀能力.
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