基于石墨涂层传热技术制备界面冶金结合泡沫铝夹芯板  

Preparation of interfacial metallurgically-bonded aluminum foam sandwich panels by graphite coating heat transfer technology

作　　者：孙溪 豆志河 苏喜喜 黄鹏 高强 冯展豪 祖国胤 Xi SUN;Zhi-he DOU;Xi-xi SU;Peng HUANG;Qiang GAO;Zhan-hao FENG;Guo-yin ZU(School of Metallurgy,Northeastern University,Shenyang 110819,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学冶金学院,沈阳110819 [2]东北大学材料科学与工程学院,沈阳110819

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第4期1081-1090,共10页中国有色金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52071069,U1332110);the Liaoning Revitalization Talents Program,China(No.XLYC1902097)。

摘　　要：提出一种通过石墨涂敷处理(GCT)泡沫铝夹芯板(AFS)前驱体来提高其在粉末冶金发泡过程中传热效率的新方法。研究不同传热方法的升温和膨胀特征以及对泡孔结构和抗弯性能的影响。结果表明,前驱体在采用GCT后,升温速度增加近2倍,这提高了AFS的膨胀率、改善了泡孔尺寸均匀性和外部面板形态。此外,在发泡后期阶段具有更加平稳的升温速率,这有助于提高泡孔圆度,并减少泡壁内微孔缺陷。这些改变使AFS的弯曲强度和吸能性能得以显著提高。值得注意的是,因为热传递速率不受板幅尺寸的影响,GCT技术在大尺寸AFS的生产中具有巨大潜力。An innovative approach that utilizes a graphite coating treatment(GCT)on precursors of aluminum foam sandwich(AFS)panels was proposed to improve heat transfer efficiency during the powder metallurgical foaming process.The heating and expansion characteristics,effects on cell structures and bending performance of different heat transfer methods were studied.The results indicated that the heating rates of precursors increased by approximately two-fold after applying GCT,resulting in improvements in the expansion ratio,cell size uniformity,and panel surface morphology of the AFS.Furthermore,the later stage of foaming featured a more consistent heating rate,increasing cell roundness and reducing microporous defects within cell walls.These advancements consequently bolstered the bending strength and energy absorption properties of AFS.Notably,GCT technology holds great potential for the production of large-format AFS,as the heat transfer rate remains unaffected by panel size.

关 键 词：泡沫铝夹芯板 粉末冶金发泡 高效传热 石墨涂敷处理 泡孔结构 

分 类 号：TF123[冶金工程—粉末冶金]