Planting carbon nanotubes within Ti-6Al-4V to make high-quality composite powders for 3D printing high-performance Ti-6Al-4V matrix composites
Planting carbon nanotubes within Ti-6Al-4V to make high-quality composite powders for 3D printing high-performance Ti-6Al-4V matrix composites
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在 Ti-6Al-4V 中植入碳纳米管，制备用于 3D 打印高性能 Ti-6Al-4V 基复合材料的高质量复合粉末
DOI：
10.1016/j.scriptamat.2020.03.009
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发表时间：
2020
影响因子：
6
通讯作者：
Yafeng Yang
中科院分区：
文献类型：
--
作者：
Yu Liu;Shaofu Li;R.D.K. Misra;Kang Geng;Yafeng Yang
我们开发了一种在球形Ti-6Al-4V粉末中植入碳纳米管（CNTs）的新工艺，以制备CNTs/Ti-6Al-4V复合粉末。新型粉末解决了CNTs保持球形形貌和均匀分散的问题，因此具有良好的可打印性。印刷后的相对密度为99.9%。在微观结构上，部分碳纳米管被保留，而其余的碳纳米管分别通过界面反应和溶解沉淀机制形成TiC纳米颗粒和纳米血小板。由于TiC纳米片的桥接增强和载荷从基体向CNTs的传递的协同作用，打印的复合材料的抗拉屈服强度为1162 MPa，伸长率为3.2%。
We developed a novel process of planting carbon nanotubes (CNTs) within spherical Ti-6Al-4V powder to fabricate a CNTs/Ti-6Al-4V composite powder. The new powder addressed the issues of spherical morphology maintaining and homogenous dispersion of CNTs, and thereby exhibited good printability. After printing, a relative density of 99.9% was obtained. Microstructurally, some CNTs were retained, while the remaining formed TiC nanoparticles and nanoplateletsviainterfacial reaction and dissolution-precipitation mechanisms, respectively. The printed composites had tensile yield strength of 1162 MPa and elongation of 3.2% due to synergistic effect of bridge enhancement of TiC nanoplatelets and load transfer from matrix to CNTs.