Crack healing in liquid-phase-pressureless-sintered silicon carbide–aluminum nitride composites

Magnani, Giuseppe; Beaulardi, Leandro; Brentari, Alida; Toyoda, Takehiro; Takahashi, Koji

doi:10.1016/j.jeurceramsoc.2009.08.002

Cited by 17 publications

(4 citation statements)

References 10 publications

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“…[2][3][4][5][6][7][8][9][10][11][12][13][14][15] The proposed mechanisms of crack healing have been described by many researchers. Among the several types of crack healing, that induced by the oxidation of silicon carbide (SiC) has advantages, because the complete recovery of strength is attained by this mechanism.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of strength and reliability of ceramics by shot peening and crack healing

Takahashi

Nishio

Kimura

et al. 2010

Journal of the European Ceramic Society

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In this study we propose a new method for improving the surface strength and reliability of ceramics that combines shot peening with crack-healing ability. We used Si 3 N 4 /SiC composite ceramics with high crack-healing ability and subjected the specimens to shot peening and crack healing. To evaluate the effect of our method, we investigated the residual stress after shot peening and crack healing and examined the specimens' mechanical properties, including apparent fracture resistance, contact strength and bending strength. We found that shot peening and crack healing is effective to increase apparent fracture resistance, contact strength and bending strength.

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Section: Introductionmentioning

confidence: 99%

“…7,8 Since then, there have been many reports on crack-healing behavior of Si 3 N 4 /SiC, 8,9,12 mullite/SiC, 7,13 Al 2 O 3 /SiC 10,11 and SiC/AlN. 14 Shot peening is a common procedure used to increase the near-surface strength of metals. 16 In the shot-peening process, a stream of small, hard spheres is shot at a treated surface.…”

Section: Introductionmentioning

confidence: 99%

Improvement of strength and reliability of ceramics by shot peening and crack healing

Takahashi

Nishio

Kimura

et al. 2010

Journal of the European Ceramic Society

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“…After damage, heat treatment leads to the formation of oxidation products that fill the crack by volume increase, thereby ideally restoring the original material properties. SiC combined with Y 2 O 3 stabilized zirconia, Si 3 N 4 or mullite (Al 2 Al 2 + 2x Si 222x O 102x ), proved to be efficient compositions for self-healing ceramics (Jung et al, 2009;Magnani et al, 2010;Nam and Hwang, 2012;Takahashi et al, 2010).…”

Section: Healing Through Oxidation Productsmentioning

confidence: 99%

Study of quantification methods in self-healing ceramics, polymers and concrete: A route towards standardization

Lucas

Tapavicza

Schmidt

et al. 2016

Journal of Intelligent Material Systems and Structures

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During the past decades, research in self-healing materials has focused on the improvement in the mechanical properties, making stronger materials, able to bear increasing solicitations. This strategy proved to be costly and in some cases inefficient, since materials continue to fail, and maintenance costs remained high. Instead of preparing stronger materials, it is more efficient to prepare them to heal themselves, reducing repairing costs and prolonging their lifetime. Several different self-healing strategies, applied to different material classes, have been comprehensively studied. When new materials are subject of research, the attention is directed into the formulations, product processing and scale-up possibilities. Efforts to measure self-healing properties have been conducted considering the specific characteristics of each material class. The development of comprehensive service conditions allowing a unified discussion across different materials classes and the standardization of the underlying quantification methods has not been a priority so far. Until recently, the quantification of self-healing ability or efficiency was focused mostly on the macroscale evaluation, while micro and nanoscale events, responsible for the first stage in material failure, received minor attention. This work reviews the main evaluation methods developed to assess self-healing and intends to establish a route for fundamental understanding of the healing phenomena

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“…2,3 However, mechanical damages are inevitable under operative conditions. To repair mechanical damages, mainly three methods were used: some special matrix, such as Si 3 N 4 , Al 2 O 3 and mullite were reported to have good crack self-healing ability; 4 It was also reported that cracks can be healed by being filled with silicon or silicon carbide, which can be oxidised and work as a shelter to prevent the inner materials from oxidation; [5][6][7] and some coatings were reported to have the ability to seal surface cracks, protecting the material from severe oxidation. 8,9 A glass of suitable composition for coating was fabricated by Ferraris et al with a simple and low cost slurry technique.…”

Section: Introductionmentioning

confidence: 99%

Oxidation resistance comparison of coating repaired mechanical cracks in carbon fibre reinforced silicon carbide composite

Hui

Tao

et al. 2016

Advances in Applied Ceramics

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Oxidation resistance of carbon fibre reinforced silicon carbide composites (C/SiCs) with different coating repaired mechanical cracks was investigated. Structural integrity is critically important for the service performance of components for aerospace applications, and the coatings are reported as ideal choices to repair mechanical impact induced surface cracks. In this paper, chemical vapour deposited SiC, polysilazane (PSN) pyrolysed ceramic and slurry transformed glass coatings were introduced to investigate the oxidation resistance of repaired C/SiCs. The repair effects of various coatings were compared by weight loss and residual mechanical properties. Results showed that both SiC coated and glass coated C/SiCs exhibited preferable oxidation resistance compared with the PSN coated and uncoated specimens. Correspondingly, the former exhibited less weight loss and higher residual flexural strengths than the latter. A scanning electron microscope was employed to observe the microstructures of fracture sections, which gave an intuitive explanation for the repair effect of various coatings.

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Crack healing in liquid-phase-pressureless-sintered silicon carbide–aluminum nitride composites

Cited by 17 publications

References 10 publications

Improvement of strength and reliability of ceramics by shot peening and crack healing

Improvement of strength and reliability of ceramics by shot peening and crack healing

Study of quantification methods in self-healing ceramics, polymers and concrete: A route towards standardization

Oxidation resistance comparison of coating repaired mechanical cracks in carbon fibre reinforced silicon carbide composite

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