Joining and testing of alumina fibre reinforced YAG-ZrO2 matrix composites

Akram, Muhammad Yasir; Ferraris, Monica; Casalegno, Valentina; Salvo, Milena; Puchas, Georg; Knohl, Stefan; Krenkel, Walter

doi:10.1016/j.jeurceramsoc.2017.11.026

Cited by 15 publications

(13 citation statements)

References 42 publications

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“…Glass‐ceramic joints like SACM 12 and GOX 6 show possibly higher shear strength than the joints presented here. In the works from Akram et al 6,12 the shear strength of these glass‐ceramic joints could not be measured since the used Ox‐CMCs plates failed due to delamination before the joint. During our experiments, it was identified that the failure was indeed in the joint area.…”

Section: Discussionmentioning

confidence: 59%

“…Nevertheless, the thermal stability of these joints is still lower than commercial Ox-CMCs. Blazing alloys oxidize at 550°C, 12 whereas the softening temperature of these glasses is around 800°C-900°C. 6 Since the joining of Ox-CMCs is a very important topic, yet very little investigated, the objective of this work was to develop a joining methodology using the ionotropic gelation technique.…”

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confidence: 99%

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Joining oxide ceramic matrix composites by ionotropic gelation

Almeida

Farhandi

Tushtev

et al. 2020

Int J Applied Ceramic Tech

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The production of complex‐shaped all‐oxide ceramic matrix composites (Ox‐CMC) is somewhat restricted by their current processing methods, as well as by the lack of applicable joining techniques. Thus, we present a new method for joining Ox‐CMCs based on the gelation of slurries with the polysaccharide polymer alginate. For this investigation, Nextel 610/alumina‐zirconia composites were produced using alginate as binder and aluminum acetate as gelling agent. The joining capabilities of this technique were investigated with microstructural analyses and single‐lap compression shear tests. For that, a slurry‐containing alginate was used to join two composite plates at different stages of the processing: gel state, dried green body and after sintering. Joining composites plates in their gel or green state was successful as the joints showed shear strength values similar to the interlaminar shear strength of the composites plates. The quality of the joints was attributed to the interactions between the alginate chains of the composite plates and the joint. We also show that even the joining of already sintered Ox‐CMCs is feasible. However, densification cracks and lower shear strength are observed for such cases.

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Section: Discussionmentioning

confidence: 59%

mentioning

confidence: 99%

Joining oxide ceramic matrix composites by ionotropic gelation

Almeida

Farhandi

Tushtev

et al. 2020

Int J Applied Ceramic Tech

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“…Focusing on oxide/oxide CMCs, namely alumina fiber reinforced oxide matrix composites, two silica‐based glass compositions (SACM and GOX) were designed and successfully tested to join different Ox/Ox using the glass‐ceramic method . Table summarizes SACM and GOX parent glasses and derived glass‐ceramics compositions, characteristic temperatures, CTE, crystalline phases, and joining process temperatures.…”

Section: Resultsmentioning

confidence: 99%

“…However, both SACM and GOX gave excellent mechanical strength for the joined Ox/Ox. In the case of GOX, the mechanical strength at 850°C was about 80% of the unjoined composite tested for reference …”

Section: Resultsmentioning

confidence: 99%

Glass as a joining material for ceramic matrix composites: 25 years of research at Politecnico di Torino

Ferraris

Casalegno

Smeacetto

et al. 2020

Int J of Appl Glass Sci

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A revision and update about the research activity done in the past 25 years at Politecnico di Torino (Italy) on design and testing of glasses and glass-ceramics for the joining of Ceramic Matrix Composites (CMCs) will be presented and discussed.The "glass-ceramic method" to obtain a thermo-mechanically stable joint starting from a glass will be detailed with some examples. Several new glass compositions will be presented together with their characterization and behavior as joining materials for oxide-based and nonoxide-based CMC. K E Y W O R D SCMC, glass-ceramics, joining 570 | FERRARIS Et Al.

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“…Ceramic matrix composites (CMC) are leading candidates for high performance structures such as space vehicles, land based turbines, commercial and military aircraft engines, advanced missiles and rockets [5]. YAG fiber is a suitable candidate material which is used as reinforcement in the ceramic matrix, particularly in high temperature applications over 1400°C [4].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Grain-Growth of Magnesia-Alumina Spinel/Yttrium Aluminum Garnet Composite Fibers

Ma¹

2018

Ceramics - Silikaty

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Magnesia-alumina spinel/yttrium aluminum garnet composite fibers were prepared by sol-gel method. The spinnability of precursor sol remarkably depended on the addition amount of polyvinylpyrrolidone. Long gel fibers, with 80 cm in length, were obtained by adding 28 wt. % spinning additive. The phases of composite fibers were magnesia-alumina spinel and yttrium aluminum garnet after heating at 1400°C for 2 h. The Mg iron can hinder the yttrium aluminum garnet grain growth by solute drag and grain boundary pinning. The grain growth exponent was about 3.7 at 1600°C.

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Joining and testing of alumina fibre reinforced YAG-ZrO2 matrix composites

Cited by 15 publications

References 42 publications

Joining oxide ceramic matrix composites by ionotropic gelation

Joining oxide ceramic matrix composites by ionotropic gelation

Glass as a joining material for ceramic matrix composites: 25 years of research at Politecnico di Torino

Preparation and Grain-Growth of Magnesia-Alumina Spinel/Yttrium Aluminum Garnet Composite Fibers

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