Abstract: The pressureless sintering using tube furnace plays a decisive role in the microstructure and compactness of unidirectional porous copper prepared by direct ink writing. In this work, unidirectional porous copper was prepared by DIW and sintering process. The microstructures of unidirectional porous copper after singtering under flowing high purity argon gas and Ar-H2 gas mixture were compared by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the oxidation behavior during singtering was analyzed. The effects of sintering temperature and holding time on the density of unidirectional porous copper were studied under different sintering parameters. The results show that:sintered in high purity argon, unidirectional porous copper undergoes severe oxidation and generates Cu2O, while Ar-H2 mixture effectively avoids oxidation by reduction. The optimal sintering process parameters were sintering temperature of 1 100 ℃ and holding time of 6 h. The density of unidirectio-nal porous copper reached 87.2% and the shrinkage rate was 33.3%. This study provides theoretical guidance for pressureless sintering DIW porous copper in tube furnace.
万胤辰, 王匀, 李瑞涛, 徐磊, 于超, 顾宇佳. 无压烧结工艺对浆料直写式定向多孔铜组织及致密度的影响[J]. 材料导报, 2024, 38(3): 22040202-6.
WAN Yinchen, WANG Yun, LI Ruitao, XU Lei, YU Chao, GU Yujia. Effect of Pressureless Sintering Process on Microstructure and Density of Unidirectional Porous Copper Fabricated by Direct Ink Writing. Materials Reports, 2024, 38(3): 22040202-6.
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2024, Vol. 38 
