Boron Nitride Doped Transparent Polycrystalline Silicon Nitride Ceramics
Keyword(s):
X Ray
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The addition of h- BN to a polycrystalline Si3N4 was to increase the fracture toughness and other mechanical properties such as flexural strength and hardness of the material. The hot pressed samples were prepared from the mixture of α-Si3N4, AlN, MgO and h-BN. The composite contained from 0 to 2 wt.% BN powder with sintering aids (9% AlN + 3% MgO). The transparency, mechanical properties and microstructure of hot pressed polycrystalline Si3N4-BN composite materials were investigated by UV/VIS spectrophotometer, scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The transparency decreased with increasing the content of h-BN into Si3N4.
2012 ◽
Vol 476-478
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pp. 1031-1035
2013 ◽
Vol 745-746
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pp. 652-656
2017 ◽
Vol 12
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pp. 63-77
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2019 ◽
Vol 2019
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pp. 1-7
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2013 ◽
Vol 86
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pp. 205-217
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2014 ◽
Vol 50
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pp. 87-90
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