石墨烯调控<strong>3D</strong>打印功能钛的组织和性能

doi:10.11901/1005.3093.2022.391

材料研究学报

2023, Vol. 37

Issue (10): 791-800 DOI: 10.11901/1005.3093.2022.391

研究论文

本期目录 | 过刊浏览

石墨烯调控3D打印功能钛的组织和性能

王春锦, 陈文革(

), 亢宁宁, 杨涛

西安理工大学材料科学与工程学院西安 710048

Microstructure and Properties of Graphene-regulated Functional Titanium by Laser Additive Manufacturing

WANG Chunjin, CHEN Wenge(

), KANG Ningning, YANG Tao

Xi'an University of Technology, School of Material Science and Engineering, Xi'an 710048, China

引用本文:

王春锦, 陈文革, 亢宁宁, 杨涛. 石墨烯调控3D打印功能钛的组织和性能[J]. 材料研究学报, 2023, 37(10): 791-800.
Chunjin WANG, Wenge CHEN, Ningning KANG, Tao YANG. Microstructure and Properties of Graphene-regulated Functional Titanium by Laser Additive Manufacturing[J]. Chinese Journal of Materials Research, 2023, 37(10): 791-800.

全文: PDF(12465 KB) HTML

摘要:

用选区激光熔化(SLM)技术制备多孔石墨烯/钛复合材料，研究了石墨烯(Gr)作为增强相对其微观结构、力学性能以及抗腐蚀性能的影响。结果表明：用SLM制备的多孔钛由较小的等轴晶组成，石墨烯加入使其晶粒尺寸进一步减小，石墨烯没有在Ti基体中团聚，部分石墨烯与Ti原位生成的TiC产生了弥散强化。多孔Gr/Ti复合材料的压缩曲线由弹性变形阶段、应力平台阶段和致密化阶段组成，其硬度、抗压强度和压缩率分别为503HV、317.38 MPa和42%；其抗腐蚀性能高于纯钛，腐蚀电位为-0.325 V，腐蚀电流密度为3.28×10^-7 A·cm^-2。

关键词 ：金属材料, 多孔钛, 石墨烯, 激光选区熔化, 组织与性能

Abstract：

Porous graphene /Ti(Gr/Ti) composites were fabricated by selective laser melting (SLM) technique with the mixture of Ti powder and graphene as raw material, and the effect of graphene (Gr) addition on the microstructure, mechanical properties and corrosion resistance of porous Gr/Ti composites were investigated. The results show that the macrostructure of the porous Gr/Ti composite is not significantly different from the designed structure, but the porosity is lower than the designed structure. The porous pure titanium prepared by SLM consists of small equiaxed grains, and the grain size of which is further reduced after the addition of graphene, while the graphene uniformly distributed in the Ti-matrix. A small portion of graphene reacts with Ti-matrix leading to the formation of TiC, as a result, the in-situ generated TiC as second phase particles can reinforce the base metal through dispersion strengthening. The compression stress-strain curves of the porous Gr/Ti composite display elastic deformation stage, stress plateau stage and densification stage. The hardness, compressive strength and compression ratio of the porous Gr/Ti composite were 503HV, 317.38 MPa and 42%, respectively. Its corrosion potential and the corrosion current density were -0.325 V and 3.28×10^-7 A·cm^-2 respectively, indicating a better corrosion resistance in the comparison to the one of pure Ti.

Key words： metallic meterials porous Ti graphene selective laser melting microstructure and properties

收稿日期: 2022-07-18

ZTFLH:

TG665

基金资助:西安市科技攻关项目(23ZDCYJSGG0042-2002)

通讯作者: 陈文革，教授， wgchen001@263.net，研究方向为功能材料、先进粉末冶金及新金属材料

Corresponding author: CHEN Wenge, Tel: (029)82312383, E-mail: wgchen001@263.net

作者简介: 王春锦，男，1995年生，硕士

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表1 纯钛粉的化学成分

图1 钛粉和石墨烯纳米片的SEM形貌

表2 石墨烯纳米片的基本性能

图2 多孔骨架模型

表3 选区激光熔化工艺参数

表4 Ringers模拟体液的成分

图3 不同方向3D打印多孔钛和石墨烯/多孔钛复合材料的宏观形貌

图4 不同方向3D打印的多孔Ti及Gr/Ti的孔结构SEM形貌

图5 致密Ti、多孔Ti和多孔Gr/Ti的显微组织

图6 Ti粉、石墨烯片和不同钛材料的XRD谱和Raman光谱

图7 多孔Gr/Ti复合材料的TEM形貌和SAED图

图8 三种钛材料的压缩应力应变曲线

图9 多孔纯钛、Gr/Ti复合材料和致密钛的压缩断口形貌

图10 多孔Gr/Ti复合材料和多孔Ti的阳极极化曲线和阻抗谱

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