Polycrystalline micropillars by a novel 3-D printing method and their behavior under compressive loads
Polycrystalline micropillars by a novel 3-D printing method and their behavior under compressive loads
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DOI：
10.1016/j.scriptamat.2018.02.027
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发表时间：
2018-05-01
影响因子：
6
通讯作者：
Panat, Rahul
中科院分区：
文献类型：
--
作者：
Saleh, M. Sadeq;HamidVishkasougheh, Mehdi;Panat, Rahul
我们提出了一种全新的自下而上的多晶微柱制造方法，使用直接打印和烧结的纳米粒子在3D和研究他们的行为下压缩不同的微观结构。柱表现出脆性行为，具有较高的有效模量的小晶粒尺寸与高孔隙率，而高韧性行为，具有较低的有效模量和较大的晶粒尺寸，但低孔隙率。这些不寻常的趋势解释了孔隙度模型。这一结果为多晶材料微尺度材料科学的基础研究提供了一种新的制备微柱的方法。(C)2018 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
We present an entirely new method of bottoms-up fabrication of polycrystalline micropillars using direct printing and sintering of nanoparticles in 3D and study their behavior under compression for different microstructures. The pillars showed brittle behavior with higher effective modulus for small grain sizes with high porosity, while highly ductile behavior with a lower effective modulus and larger grain sizes but low porosity. These unusual trends are explained by a porosity model. The results point to a novel method of fabricating micropillars with different microstructures to study fundamental materials science of polycrystalline materials at micro to meso-length scales. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.