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通过热机械化学处理对Ag-Sn-Zn固溶液粉末的氧化作用的动力学研究

Danny Guzmán¹, Augusto Figueroa¹, Alvaro Soliz¹

¹Departamento de Ingeniería en Metalurgia, Universidad de Atacama, Av. Copayapu 485, Copiapó 1530000, Chile.

Materials (Basel, Switzerland)

|October 26, 2024

概括

研究人员使用银--锡氧化物 (Ag-Zn2SnO4) 开发了一种新型,环保的电接触材料. 这种材料为传统的基接触器提供了更安全的替代品,对于低压设备具有有前途的性能.

科学领域:

材料科学材料科学材料科学
固态化学固态化学
部落学 (tribology) 是一个学科.

背景情况:

银氧化物 (Ag-CdO) 复合材料在历史上是电接触器的首选材料,因为它们具有出色的导电性和电弧阻力.
(Cd) 的毒性需要开发对电气接触材料的环保替代品.
基于Ag的复合材料对于开关和继电器等低压设备至关重要.

研究的目的:

为了研究基于Ag-Zn2SnO4的新型电接触材料的热机械化学氧化的动力学.
为了建立一个同质的合成路径,纳米级Zn2SnO4沉在一个Ag矩阵.
为Ag-CdO材料提供更安全,更环保的替代品.

主要方法:

一种Ag-Sn-Zn固体溶液的机械合金.
热机械化学氧化Ag-Sn-Zn固体溶液的过程.
使用约翰逊-梅尔-阿弗拉米-科尔摩戈罗夫 (JMAK) 模型进行动力分析.
微结构分析和激活能量 (Ea) 确定.

主要成果:

实现了一种新的合成路径,产生基于Ag的复合材料与均分布的纳米级Zn2SnO4沉物.
机械化学氧化动力学遵循了约翰逊-梅尔-阿弗拉米-科尔莫戈罗夫模型.
氧化过程的特点是三维的氧化物生长受到氧气扩散后核化的限制.

结论:

热机械化学氧化过程是有效的创建先进的Ag-Zn2SnO4电接触材料.
该研究提供了合成的动力模型,有助于材料设计.
这种环保材料为Ag-CdO接触器提供了一个可行的,无毒的替代品.

关键词:

电气接触材料的使用.热热的机械化学加工.动力学研究动力学研究机械合金机械合金

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