基于SLM的模拟月壤原位成形技术

doi:10.13700/j.bh.1001-5965.2018.0690

北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (10): 1931-1937.doi: 10.13700/j.bh.1001-5965.2018.0690

基于SLM的模拟月壤原位成形技术

李雯¹, 徐可宁¹, 黄勇², 胡文颖¹, 王道宽³, 姚思齐²

1. 中国航空发动机研究院, 北京 101304;
2. 北京航空航天大学航空科学与工程学院, 北京 100083;
3. 北京科技大学新材料技术研究院, 北京 100083

收稿日期:2018-11-23 出版日期:2019-10-20 发布日期:2019-10-31
通讯作者: 李雯 E-mail:mosquato@buaa.edu.cn
作者简介:李雯女,博士,研究员。主要研究方向:特种材料增材制造技术及其多尺度数值仿真技术;黄勇男,博士,教授,博士生导师。主要研究方向:空间热辐射理论。
基金资助:
国家自然科学基金（51705490，51876004）；国防科技创新特区项目

In-situ forming of lunar regolith simulant via selective laser melting

LI Wen¹, XU Kening¹, HUANG Yong², HU Wenying¹, WANG Daokuan³, YAO Siqi²

1. Aero Engine Academy of China, Beijing 101304, China;
2. School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, Chin;
3. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China

Received:2018-11-23 Online:2019-10-20 Published:2019-10-31
Supported by:
National Natural Science Foundation of China (51705490,51876004); National Defense Science and Technology Innovation Special Zone Project

摘要/Abstract

摘要： 激光选区熔化（SLM）技术与原位资源利用（ISRU）概念结合，有望解决地外大规模基地建设的工程难题。利用模拟月壤考察了SLM成形技术用于月球原位资源增材制造的可行性。采用高能束激光为热源，对粉床内模拟月壤颗粒进行逐层照射，使颗粒熔融固结。以激光体积能量密度为综合评价指标，开展SLM工艺参数研究，实现模拟月壤的低能耗、高效率、高几何精度成形。研究结果表明：模拟月壤在激光工作波长吸收率高，热稳定性好，利用较低激光能量可实现模拟月壤SLM成形，成形件几何精度高；激光体积能量密度决定了成形件质量，增加激光体积能量密度可以提高成形件力学性能，但过高的激光体积能量密度使成形件发生严重变形；模拟月壤颗粒形态复杂、粒度分布广、流动性差，通过优化颗粒粒径分布范围，可以有效提高粉体的流动性，从而形成致密且均匀的粉床，避免成形件缺陷的产生。

关键词: 月球探测, 模拟月壤, 原位制造, 原位资源利用(ISRU), 增材制造

Abstract: Selective laser melting (SLM) technique in combination with the in-situ resource utilization (ISRU) concept can be an off-world manufacturing solution to the significant engineering challenge on the large-scale construction for extra-terrestrial bases. The feasibility of SLM process applied to the additive manufacturing of lunar in-situ resource was investigated by utilizing lunar regolith simulant. A laser source was utilized to melt the powder locally in a layer-wise manner. In order to successfully fuse the powder into parts with low laser power, high efficiency and high geometrical accuracy, the SLM process parameters were investigated and evaluated by laser volume energy density. The results show that the simulant can be successfully fused into parts with high geometrical accuracy using SLM process with low laser power due to its high absorbance and low mass loss. The fabricated part quality depends on the laser volume energy density:increase of laser volume energy density input results in better mechanical properties of parts; however, excessive laser volume energy density input leads to high distortion of parts. Poor powder fluidity of the raw simulant is observed due to its complex particulate shape and a wide range of particle size distribution. The powder fluidity of the simulant is improved by optimizing its particle size range, resulting in a denser and more uniform powder bed, which can avoid defects within fabricated parts.

Key words: lunar exploration, lunar regolith simulant, in-situ manufacturing, in-situ resource utilization (ISRU), additive manufacturing

中图分类号:

V11
TH16

李雯, 徐可宁, 黄勇, 胡文颖, 王道宽, 姚思齐. 基于SLM的模拟月壤原位成形技术[J]. 北京航空航天大学学报, 2019, 45(10): 1931-1937.

LI Wen, XU Kening, HUANG Yong, HU Wenying, WANG Daokuan, YAO Siqi. In-situ forming of lunar regolith simulant via selective laser melting[J]. JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2019, 45(10): 1931-1937.

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基于SLM的模拟月壤原位成形技术

In-situ forming of lunar regolith simulant via selective laser melting

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