Separating macrostresses from microstresses in Al2O3–15vol%SiC particulate reinforced composites

Zou, Ji; Zhong, Yuan; Zhang, Jun-Zhan; Ekelund, Magnus; Shen, Zhijian

doi:10.1016/j.scriptamat.2015.07.026

Cited by 10 publications

(2 citation statements)

References 20 publications

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“…2(a)-2(f), respectively. In the experiential results, the S1 Raman mode of 𝛼-Al 2 O 3 is 420.7 cm −1 , [21] which is slightly different from our calculation of 431.6 cm −1 . This is due to the fact that oxygen vacancy in Al 2 O 3 will break its structural symmetry, and some modes may be shifted.…”

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confidence: 99%

Raman Scattering Modification Induced by Structural Change in Alumina Polymorphs

Zhang

Guo

et al. 2015

Chinese Phys. Lett.

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The calculated Raman spectra disclose that alumina polymorphs of nordstrandite, gibbsite, diaspore, boehmite, bayerite and 𝛼-Al2O3 display different phonon behaviors, which can be attributed to their internal crystal structure changes. The strongest Raman peaks of nordstrandite, gibbsite, diaspore, boehmite, bayerite and 𝛼-Al2O3 are located at 214.2 cm −1 , 3314.4 cm −1 , 2298.6 cm −1 , 747.7 cm −1 , 3484.6 cm −1 and 529.2 cm −1 , respectively. The characterizations in Raman spectra of those polymorphs are obviously different, which can be used in fingerprints to identify the alumina polymorphs structure.

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confidence: 99%

Raman Scattering Modification Induced by Structural Change in Alumina Polymorphs

Zhang

Guo

et al. 2015

Chinese Phys. Lett.

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“…According to Zhu et al [53], the flexural strength of porous alumina increased with increasing sintering temperature. The flexural strength of porous ceramics depends on the sintering neck areas among the grains and the amount of sintering necks [54][55][56]. Along with the increase in sintering temperature, the growth of sintering necks and sintering densification are promoted, increasing the flexural strength and decreasing the porosity.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Effect of sintering temperature in argon atmosphere on microstructure and properties of 3D printed alumina ceramic cores

et al. 2020

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Alumina ceramics with different sintering temperatures in argon atmosphere were obtained using stereolithography-based 3D printing. The effects of sintering temperature on microstructure and physical and mechanical properties were investigated. The results show that the average particle size, shrinkage, bulk density, crystallite size, flexural strength, Vickers hardness, and nanoindentation hardness increased with the increase in sintering temperature, whereas the open porosity decreased with increasing sintering temperature. No change was observed in phase composition, chemical bond, atomic ratio, and surface roughness. For the sintered samples, the shrinkage in Z direction is much greater than that in X or Y direction. The optimum sintering temperature in argon atmosphere is 1350 ℃ with a shrinkage of 3.0%, 3.2%, and 5.5% in X, Y, and Z directions, respectively, flexural strength of 26.7 MPa, Vickers hardness of 198.5 HV, nanoindentation hardness of 33.1 GPa, bulk density of 2.5 g/cm 3 , and open porosity of 33.8%. The optimum sintering temperature was 70 ℃ higher than that sintering in air atmosphere when achieved the similar properties.

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Ultraviolet B emitting Gd doped Al2O3 phosphor – A photoluminescence and electron paramagnetic resonance study

Singh

Sivaramaiah²,

Singh

et al. 2018

Optik

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Separating macrostresses from microstresses in Al2O3–15vol%SiC particulate reinforced composites

Cited by 10 publications

References 20 publications

Raman Scattering Modification Induced by Structural Change in Alumina Polymorphs

Raman Scattering Modification Induced by Structural Change in Alumina Polymorphs

Effect of sintering temperature in argon atmosphere on microstructure and properties of 3D printed alumina ceramic cores

Ultraviolet B emitting Gd doped Al2O3 phosphor – A photoluminescence and electron paramagnetic resonance study

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