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在MnO₂和CeO₂中,相位稳定性和渣渣诱导的不稳定性-化和稳定的

Hwanseok Lee¹, Hee-Seon Lee^1,2, Seonghoon Kim¹

¹School of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of Korea.

Materials (Basel, Switzerland)

|November 25, 2023

概括

用MnO2和CeO2对稳定 (CSZ) 进行注,会影响相位形成和机械性能. CeO2注提高了CSZ的耐腐蚀性,而MnO2注则使其恶化.

科学领域:

材料科学材料科学材料科学
陶工程陶工程陶工程
腐蚀科学腐蚀科学

背景情况:

稳定 (CSZ) 对于高温应用至关重要.
提高CSZ的耐腐蚀性,特别是对化模具流量的耐腐蚀性,对于提高耐久性至关重要.
了解剂对相位稳定性和机械完整性的影响是关键.

研究的目的:

调查二氧化 (MnO2) 和二氧化 (CeO2) 兴奋剂对CSZ的相位形成,机械性能和化模具流体耐腐蚀性的影响.
为了比较MnO2和CeO2作为CSZ剂的有效性,以提高其性能.

主要方法:

合成MnO2合和CeO2合的CSZ材料.
使用X射线衍射 (XRD) 进行相位形成的表征.
评估机械性能,包括维克尔硬度和屈曲强度.
通过化模具流量暴露试验和腐蚀后分析 (SEM-EDS,XRD) 评估耐腐蚀性.

主要成果:

二氧化兴奋剂降低了单临床阶段,最初增加了硬度和强度,但高度的立方相形成导致了性能降解和腐蚀抵抗的恶化.
CeO2 兴奋剂也减少了单临床阶段,但效果不如 MnO2. 虽然硬度和强度由于相对密度较低而下降,但耐腐蚀性优于CSZ.
腐蚀后XRD显示所有测试材料的单临床阶段增加,但CeO2合的CSZ保持了低于未合的CSZ的单临床分数.

结论:

与MnO2相比,CeO2染为CSZ提供了优越的耐腐蚀性,这种耐腐蚀性归因于稳定的Ce4+状态,在土晶格内基本性差异最小.
O2合物,特别是3+和2+状态,由于较大的基本性差异和较低的点,会对耐腐蚀性产生负面影响.
优化剂度和理解相位转换对于开发适用于苛刻环境的先进基材料至关重要.

关键词:

稳定的金.沉浸阻力沉浸阻力阶段稳定性阶段稳定性污垢污垢污垢污垢污垢稳定剂是一种稳定剂.潜水进入喷嘴的潜水进入喷嘴.

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