Statistical analysis for the strength and thermal shock behavior of MoAlB

IF 3.8 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2025-05-09 DOI:10.1111/jace.20621

Hang Yin, Kebin Qin, Xiaodong He, Dongdong Sun, Chuchu Yang, Guangping Song, Yongting Zheng, Yuchen Yuan, Yuelei Bai

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Abstract

The statistical distribution for the strength as well as thermal shock behavior of high-purity MoAlB, fabricated via self-propagating high-temperature combustion synthesis with hot pressing (SHS/HP), was investigated. Among the statistical distribution models, the three-parameter Weibull (3P-Weibull) method exhibited the best fit for the flexural strength of MoAlB, with the primary error in the low-stress region. Notably, the 3P-Weibull modulus of MoAlB fell between those of typical metals and ceramics, aligning with the trends in fracture toughness and thermal conductivity. Its critical thermal shock temperature ranges from 100°C to 200°C. The introduced pores did not only enhance thermal shock resistance across the entire temperature range, but also result in an abnormal strength recovery above 1000°C, which suggests that pores play a significant role in the abnormal strength recovery after water quenching, in addition to the established explanations such as the formation of oxide layer and grain kinking.

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MoAlB强度及热震性能的统计分析

研究了热压自蔓延高温燃烧合成（SHS/HP）法制备的高纯度MoAlB的强度和热冲击性能的统计分布。在统计分布模型中，三参数Weibull （3P-Weibull）方法对MoAlB抗弯强度的拟合效果最好，在低应力区域误差最大。值得注意的是，MoAlB的3P-Weibull模量介于典型金属和陶瓷之间，与断裂韧性和导热系数的变化趋势一致。其临界热冲击温度范围为100℃~ 200℃。引入的孔隙不仅在整个温度范围内增强了抗热震性，而且在1000℃以上导致了强度的异常恢复，这表明除了氧化层的形成和晶粒扭结等现有解释外，孔隙在水淬后强度的异常恢复中起着重要作用。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.