The fabrication of Al2O3–Al FGM by SPS under different sintering temperatures: Microstructural evaluation and bending behavior

Farahmand, Saeed; Monazzah, A. Hosseini; Soorgee, Mohammad Hossein

doi:10.1016/j.ceramint.2019.07.318

Cited by 24 publications

(9 citation statements)

References 33 publications

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“…SEM observations of these fracture surfaces show a high degree of densification, due to the introduction of the waste as a melting compound, confirming the values seen in Table 2. Other researchers have reported a similar phenomenon 59,60,61 …”

Section: Resultssupporting

confidence: 54%

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Incorporating sugarcane bagasse ash into Al₂O₃ ceramic tapes

Silva

Alves

Freitas

et al. 2020

Int J Applied Ceramic Tech

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High-temperature co-fired ceramic (HTCC) technology has attracted increasing attention due to its cost-benefit ratio and excellent working capacity in adverse temperature environments, 1,2,3 applying to components of gas turbine engines for high-temperature aircraft. 4,5 Typically, fibers ceramic matrices are commonly used in exhaust structures in these turbines, presenting irregular and low hardness surfaces, which generate insufficient resistance to wear and erosion. 6,7 Thus, it is necessary to develop ceramic substrates that serve as protective covers for these materials. 8,9 We commonly use alumina ceramic matrices as the material for substrates and packages because of their excellent mechanical and thermal properties, high dielectric strength, high resistivity, and thermal and chemical stability. 10,11 However, the use of pure alumina nanoparticles is limited for this purpose, considering that its sintering temperature for dense bodies occurs above 1350°C. 12,13 The incorporation of industrial waste such as from the sugarcane bagasse ash (SCBA) into the alumina substrate serves as a flux, decreasing the sintering temperature. 14,15 Generally, waste will have discarded outdoors, causing significant environmental problems, affecting flora, fauna, and people's

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Section: Resultssupporting

confidence: 54%

“…Other researchers have reported a similar phenomenon. 59,60,61 Finally, we investigate the dielectric properties of the Al 2 O 3 powder and the Al 2 O 3 -SCBA tape. Dielectric characterization is performed by measuring the dielectric constant and loss.…”

Section: F I G U R E 1 (A)mentioning

confidence: 99%

Incorporating sugarcane bagasse ash into Al₂O₃ ceramic tapes

Silva

Alves

Freitas

et al. 2020

Int J Applied Ceramic Tech

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“…7 c2 and d2). It has been reported that transgranular fracture is closely related to grain boundary strength and easily occurs as the grain boundary strength increases [40] , [41] . Thus, the transformation tendency from intergranular fracture to transgranular fracture in the present study might be related to the strong interface bonding formed by in situ reaction during SLM process, which makes it difficult for the Zn grains to be drawn out from the grain boundary.…”

Section: Resultsmentioning

confidence: 99%

Pre-oxidation induced in situ interface strengthening in biodegradable Zn/nano-SiC composites prepared by selective laser melting

Gao

Yang

Peng

et al. 2022

Journal of Advanced Research

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“…Figure 6c shows the microstructure of the sample F-C1/3 consisting of two layers with composition The grain growth of the layer with the composition 1 is larger than the layer with the composition 3, but the grain growth was not as significant as that exhibited in the F-C1 and F-C3 groups. The different thermal contractions between the two compositions may have acted as a barrier to grain growth [37]. Figure 6d…”

Section: Microstructural Analysismentioning

confidence: 99%

“…The region with the composition 1 shows a slight increase in densification when compared to the layer with the composition 3, which shows white regions that may be an indication of the formation of LiNbO 3 or Nb 3 O 7 F, which is formed by diffusion during sintering [28,36].The grain growth of the layer with the composition 1 is larger than the layer with the composition 3, but the grain growth was not as significant as that exhibited in the F-C1 and F-C3 groups. The different thermal contractions between the two compositions may have acted as a barrier to grain growth[37]. Figure6dshows the microstructure the three-layer sample F-C1/2/3.…”

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confidence: 99%

Fabrication of Al2O3-Nb2O5-LiF-ZrO2 FGMs by SPS method: Microstructural evaluation, dynamic and sintering behaviour

Ribeiro

et al. 2022

PAC

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For the first time, alumina functionally graded materials (FGMs) with additions of niobium oxide, lithium fluoride and zirconia were produced by spark plasma sintering (SPS) and their sintering behaviour and dynamic properties were studied aiming to evaluate possibility of their use as ballistic shielding. Six groups of alumina samples with different layer compositions were produced by SPS at 1400 ?C/5min. The samples were characterized by dilatometry, scanning electron microscopy (SEM) and Hopkinson split bar method. The composition with the zirconia addition exhibited lower shrinkage rates at higher temperatures than the groups without zirconia, which promoted small sample shrinkage, resulting in lower density and higher porosity. The dynamic test showed that the alumina FGMs with layer containing LiF had the highest strain and strain rate values, exhibiting that the presence of continuous gradients in the composition positively affects the ceramic properties. Densification, layer change and cracks propagating through the material layers were also analysed by SEM analyses.

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The fabrication of Al2O3–Al FGM by SPS under different sintering temperatures: Microstructural evaluation and bending behavior

Cited by 24 publications

References 33 publications

Incorporating sugarcane bagasse ash into Al₂O₃ ceramic tapes

Incorporating sugarcane bagasse ash into Al₂O₃ ceramic tapes

Pre-oxidation induced in situ interface strengthening in biodegradable Zn/nano-SiC composites prepared by selective laser melting

Fabrication of Al2O3-Nb2O5-LiF-ZrO2 FGMs by SPS method: Microstructural evaluation, dynamic and sintering behaviour

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The fabrication of Al2O3–Al FGM by SPS under different sintering temperatures: Microstructural evaluation and bending behavior

Cited by 24 publications

References 33 publications

Incorporating sugarcane bagasse ash into Al2O3 ceramic tapes

Incorporating sugarcane bagasse ash into Al2O3 ceramic tapes

Pre-oxidation induced in situ interface strengthening in biodegradable Zn/nano-SiC composites prepared by selective laser melting

Fabrication of Al2O3-Nb2O5-LiF-ZrO2 FGMs by SPS method: Microstructural evaluation, dynamic and sintering behaviour

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Incorporating sugarcane bagasse ash into Al₂O₃ ceramic tapes

Incorporating sugarcane bagasse ash into Al₂O₃ ceramic tapes