B6O materials with Al2O3/Y2O3 additives densified by FAST/SPS and HIP

B6O materials with Al2O3/Y2O3 additives densified by FAST/SPS and HIP
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通过 FAST/SPS 和 HIP 致密化的含有 Al2O3/Y2O3 添加剂的 B6O 材料

DOI:
10.1016/j.jeurceramsoc.2013.05.002
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发表时间:
2013
影响因子:
5.7
通讯作者:
Michaelis
Michaelis
中科院分区:
材料科学1区
文献类型:
--
作者:
Thiele;Herrmann;Michaelis

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采用FAST/SPS和热等静压技术在1725~1900℃温度范围内制备了Al_2O_3/Y_2O_3烧结助剂用量为0~15vol.%、Al_2O_3/(Al_2O_3+Y_2O_3)摩尔比为0.05~1的完全致密化B6O材料,其致密化和显微组织与所测得的力学性能相关。在2~3vol.%范围内加入少量添加剂,可使断裂韧性和断裂强度由纯B60的2.0MPam1/2(SEVNB)和420 Mpa提高到3.0MPam1/2和540 Mpa左右,但对硬度没有影响,仍保持在30-36 Gpa(Hv0.4)的较高水平。较高的添加剂含量不会进一步提高韧性,但会导致硬度和强度的降低。
Fully densified B6O materials with Al2O3/Y2O3sintering additives amounts systematically varied between 0 and 15vol.% and Al2O3/(Al2O3+Y2O3) molar ratios of 0.05–1 were prepared by FAST/SPS and HIP at sintering temperatures between 1725°C and 1900°C. Their densification and microstructure were correlated with measured mechanical properties. The addition of low additive amounts in the range of 2–3vol.% was found to increase the fracture toughness and strength from 2.0MPam1/2(SEVNB) and 420MPa for pure B6O to about 3.0MPam1/2and 540MPa, but it had no effect on the hardness, which remained at a high level of 30–36GPa (HV0.4). Higher additive contents did not yield a further improvement in the toughness but resulted in a reduction in hardness and strength.
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