Strengthening mechanism of Cr doping in Mo2FeB2-based cermets and effects on biphase interface

Li, Bo; Zheng, Yong; Wang, Wangwang; Wu, Hao; Li, Yufan; Lv, Jin

doi:10.1016/j.ijrmhm.2023.106485

Cited by 4 publications

(1 citation statement)

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“…In contrast, excessive CaO leads to the formation of a significant amount of CaO(Al 2 O 3 ) 6 , which is deposited and anchors at grain boundaries, hindering the densification process of Al 2 O 3 [41]. Moreover, excessive addition of SF and 316L SS leads to aggregation, creating stress concentration points and weak areas that become origins for crack nucleation and propagation [42], thus increasing the likelihood of intergranular fracture and reducing flexural strength. Figure 14c summarizes the impact of SF and 316L SS content on the toughness of Al2O3.…”

Section: Effects On Mechanical Propertiesmentioning

confidence: 99%

Vat Photopolymerization of Sepiolite Fiber and 316L Stainless Steel-Reinforced Alumina with Functionally Graded Structures

Liu,

Wu,

Guo

et al. 2024

Materials

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Alumina (Al2O3) ceramics are widely used in electronics, machinery, healthcare, and other fields due to their excellent hardness and high temperature stability. However, their high brittleness limits further applications, such as artificial ceramic implants and highly flexible protective gear. To address the limitations of single-phase toughening in Al2O3 ceramics, some researchers have introduced a second phase to enhance these ceramics. However, introducing a single phase still limits the range of performance improvement. Therefore, this study explores the printing of Al2O3 ceramics by adding two different phases. Additionally, a new gradient printing technique is proposed to overcome the limitations of single material homogeneity, such as uniform performance and the presence of large residual stresses. Unlike traditional vat photopolymerization printing technology, this study stands out by generating green bodies with varying second-phase particle ratios across different layers. This study investigated the effects of different contents of sepiolite fiber (SF) and 316L stainless steel (SS) on various aspects of microstructure, phase composition, physical properties, and mechanical properties of gradient-printed Al2O3. The experimental results demonstrate that compared to Al2O3 parts without added SF and 316L SS, the inclusion of these materials can significantly reduce porosity and water absorption, resulting in a denser structure. In addition, the substantial improvements, with an increase of 394.4% in flexural strength and an increase of 316.7% in toughness, of the Al2O3 components enhanced by incorporating SF and 316L SS have been obtained.

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Section: Effects On Mechanical Propertiesmentioning

confidence: 99%