In situ synthesis–sintering of YAG/MAS composites by reactive spark plasma sintering

Irankhah, Reza; Rahimipour, Mohammad Reza; Zakeri, M.; Razavi, Mansour

doi:10.1007/s41779-017-0165-0

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2019

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“…It is worth to note that the yttrium aluminum garnet (YAG) has been a good choice because of its high melting point, interesting mechanical properties, good high-temperature chemical stability, and what's more, a low high-temperature creep rate (lowest of all known oxides 2.5 × 10 −9 /s at 1700°C, 100 MPa) [12][13][14][15][16][17][18]. YAG was in situ synthesized in the spinel refractory matrix by using a fused spinel as the raw material and an Y 2 O 3 micropowder as the additive in this work.…”

Section: Introductionmentioning

confidence: 99%

Effect of Y2O3 doping on the high-temperature properties of magnesia aluminate spinel refractories

Liu

Wang

et al. 2019

J Aust Ceram Soc

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A series of low-creep magnesium aluminate spinel refractories doped with 0-3 wt% Y 2 O 3 were prepared by sintering at 1750°C. The physical properties, especially the high-temperature properties of the refractories, were investigated. X-ray diffractometry (XRD) and scanning electron microscopy (SEM) were applied to characterize the phases and microstructure of the refractories. The results indicated that yttrium aluminum garnet (YAG) could be in situ formed with the addition of Y 2 O 3 in the spinel refractories. This stabilized the grain boundary of the spinel. The mechanical properties and high-temperature creep resistance of the spinel refractory could significantly be improved by the addition of Y 2 O 3 .

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