Nanosized microstructure of Al2O3–ZrO2 (Y2O3) eutectics fabricated by laser engineered net shaping

Nanosized microstructure of Al2O3–ZrO2 (Y2O3) eutectics fabricated by laser engineered net shaping
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通过激光工程净成形制造的 Al2O3−ZrO2 (Y2O3) 共晶纳米级微观结构

DOI:
10.1016/j.scriptamat.2014.09.026
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发表时间:
2015-01
期刊:
影响因子:
6
通讯作者:
Bi Zhang
Bi Zhang
中科院分区:
材料科学1区
文献类型:
--
作者:
Guangyi Ma;Jiangtian Wang;Minhai Guo;Bi Zhang

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采用激光工程净成形技术,在不添加任何粘结剂的情况下,由纯粉末直接制备了圆柱形和弧形Al 2 O3-ZrO 2(Y2 O3)共晶陶瓷结构。在此过程中,混合的陶瓷粉末通过高能激光束在所需位置完全熔化,产生具有细晶粒显微结构的完全致密的陶瓷,其中共晶间距为100 nm。陶瓷的平均显微硬度和断裂韧性分别为17.15GPa和4.79MPa·m1/2。
Cylindrical and arc-shaped Al2O3–ZrO2(Y2O3) eutectic ceramic structures without any binders were directly fabricated by laser engineered net shaping from pure powders. During the process, mixed ceramic powders are completely melted at the required position by a high-energy laser beam, yielding fully dense ceramic with fine-grained microstructure in which the eutectic spacing is ∼100 nm. The average microhardness and fracture toughness of the produced ceramic are 17.15 GPa and 4.79 MPa·m1/2, respectively.
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