Investigation of Fracture Behavior of Lightweight Magnesia-Based Refractories Using Wedge Splitting Test with Digital Image Correlation and Acoustic Emission Methods

• DOI: 10.2139/ssrn.4257815
• Publication Date: 2022-10-26T19:37:20Z
• Authors: Junjie Yan; Wen Yan; Yajie Dai; Shengli Jin; Guangqiang Li; Xiao Wang
• Keywords: Digital image correlation; Wedge (geometry); Acoustic Emission

Effects of spinel powder on the fracture behavior and mechanical properties lightweight magnesia-based refractories were investigated by wedge splitting test (WST) with digital image correlation acoustic emission (AE) methods. With addition powder, magnesia showed a higher cold compressive strength compared pure refractories. From WST, increased specific energy characteristic length refractories, which improved crack propagation resistance. The tortuosity main ratio along aggregates/matrix interface reasons for reducing brittleness Furthermore, AE signal activity indicated that pregenerated micro-cracks thermal mismatch progress zone was primary way to consume in Compared reduced behavior.