Fabrication of Al2O3–YAG Equilibrium Eutectic Composites via Transformation from Fine Al2O3 and YAP Powder Mixtures
Fabrication of Al2O3–YAG Equilibrium Eutectic Composites via Transformation from Fine Al2O3 and YAP Powder Mixtures
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通过细 Al2O3 和 YAP 粉末混合物转化制备 Al2O3-YAG 平衡共晶复合材料
DOI：
10.2320/matertrans.m2012047
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发表时间：
2012
影响因子：
1.2
通讯作者：
H. Yasuda
中科院分区：
文献类型：
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作者：
T. Nagira;H. Yasuda
本文提出了一种用过冷熔体制备Al_2O_3-YAG共晶复合材料的方法。形成具有细片层间距的Al 2 O3-YAG共晶组织。然而，Al 2 O3-YAG铸件具有直径为4 - 9μm的孔隙。该组合物限于Al 2 O3-YAP雅普组合物。本文提出了一种由Al_2O_3和雅普混合细粉转变制备Al_2O_3/YAG共晶复合材料的新方法。Al_2O_3和雅普粉末的细化促进了YAG的形成，Al_2O_3包覆雅普体系向Al_2O_3包覆YAG体系转变时11%的体积膨胀有助于形成致密的Al_2O_3包覆YAG共晶压坯。Al_2O_3/YAG复合材料具有均匀的显微结构，由球状Al_2O_3和YAG晶粒组成。此外，成形温度降低到1873 K，这比使用过冷熔体的先前工艺中的成形温度低约100 K。该工艺可在较宽的Al_2O_3 ≤ xmol%Y_2O_3（10 < x < 30）组成范围内获得致密的Al_2O_3-YAG共晶压坯，其显微组织细小均匀。[doi：10.2320/matertrans.M2012047]
A process for the fabrication of Al2O3YAG eutectic composites using an undercooled melt formed by the melting of an Al2O3YAP eutectic specimen has been developed. An Al2O3YAG eutectic structure with fine lamellar spacing was formed. However, the Al2O3YAG casting has porosities with diameters of 49μm. The composition is limited to the Al2O3YAP eutectic composition. In this paper, a new method for the fabrication of Al2O3YAG eutectic composites through the transformation from fine Al2O3 and YAP powder mixtures is proposed. The enhancement of YAG formation due to the fine Al2O3 and YAP powders and the 11% volume expansion in the transformation from the Al2O3 YAP system to the Al2O3YAG system contributed to the formation of dense Al2O3YAG eutectic compact. The Al2O3YAG compact featured a uniform microstructure consisting of spherical-like Al2O3 and YAG grains. In addition, the forming temperature was reduced to 1873K, which is approximately 100K lower than that in the previous process using the undercooled melt. The proposed process provides a dense Al2O3YAG eutectic compact with a fine and uniform microstructure over a wide composition range of Al2O3xmol%Y2O3 (10 < x < 30). [doi:10.2320/matertrans.M2012047]
亚稳系到平衡系相变A12O3-YAG共晶陶瓷的形成和微观结构
DOI：
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发表时间：
2009
期刊：
Journal of Physics ; Conference Series (印刷中)
影响因子：
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作者：
T. Nagira;H. Yasuda;Masato Yoshiya
通讯作者：
Masato Yoshiya
Hideyuki Yasuda、Itsuo Ohnaka、Yoshiki Mizutani、Akira Sugiyama、Takashi Morikawa、Satoshi Takeshima、Takumi Sakimura、Yoshiharu Waku：“通过熔化 A12O3-YAP 产生的过冷熔体进行 A12O3-YAG 共晶陶瓷的凝固和成型
DOI：
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