氧化镁-石墨基耐火材料的拉伸强度：各向异性和试样尺寸的影响

IF 44 1区医学 Q1 ENDOCRINOLOGY & METABOLISM

The Lancet Diabetes & Endocrinology Pub Date : 2024-10-11 DOI:10.1016/j.ceramint.2024.10.036

Antonio H. de Aza, Patricia Acosta, Esther Quirós, Juan F. Almagro, Carmen Baudín

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引用次数: 0

摘要

自 20 世纪 70 年代以来，氧化石墨耐火材料代表了极端环境材料的新典范：这种材料由于 "原位 "微结构变化而具有抵抗力。由于主要的微观结构变化发生在基体内部，与最大骨料尺寸相比，其区域分布相对较小，因此有必要使用小试样对死后内衬进行分析。本文针对具有典型微结构代表性的商用材料，研究了圆盘（直径=18 毫米，宽=8 毫米）在直径压缩测试中的最小抗拉强度。本文讨论了骨料和石墨尺寸、石墨各向异性和试样尺寸对这些异质材料准脆性断裂的影响。

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Tensile strength of MgO-graphite based refractories: effect of anisotropy and specimen size

Oxide-graphite refractories represent the new paradigm of materials for extreme environments since 1970´s: materials that resist thanks to "in situ" microstructural changes. The analysis of post-mortem linings necessitates the use of small specimens because main microstructural changes occur within the matrix, exhibiting zonal distributions relatively small compared to maximum aggregate sizes. In this paper the minimized tensile strength of discs (diameter=18 mm, width=8 mm) tested in diametral compression is addressed for commercial materials representative of the typical microstructures. Effects of aggregate and graphite sizes, graphite anisotropy and size of the specimens on the quasi-brittle fracture of these heterogeneous materials are discussed.

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来源期刊

The Lancet Diabetes & Endocrinology ENDOCRINOLOGY & METABOLISM-

CiteScore

61.50

自引率

1.60%

发文量

371

期刊介绍： The Lancet Diabetes & Endocrinology, an independent journal with a global perspective and strong clinical focus, features original clinical research, expert reviews, news, and opinion pieces in each monthly issue. Covering topics like diabetes, obesity, nutrition, and more, the journal provides insights into clinical advances and practice-changing research worldwide. It welcomes original research advocating change or shedding light on clinical practice, as well as informative reviews on related topics, especially those with global health importance and relevance to low-income and middle-income countries. The journal publishes various content types, including Articles, Reviews, Comments, Correspondence, Health Policy, and Personal Views, along with Series and Commissions aiming to drive positive change in clinical practice and health policy in diabetes and endocrinology.