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火焰喷涂多孔Mo骨架结构对熔渗制备Mo/Cu复合材料性能的影响
发表时间：2016-09-30 浏览量：1590 下载量：488
| 全部作者： | 姚建洮，李 一，李长久，杨冠军，李成新 |
| 作者单位： | 西安交通大学材料科学与工程学院；金属材料强度国家重点实验室 |
| 摘 要： | 基于火焰喷涂沉积的多孔Mo骨架熔渗铜制备高Cu含量的Mo/Cu复合材料。通过对还原和烧结热处理的多孔Mo骨架熔渗制备的Mo/Cu复合材料的研究，揭示了多孔Mo骨架微观结构对熔渗制备的Mo/Cu复合材料性能的影响。研究表明，液态Cu能够较好地熔渗进多孔Mo骨架形成致密的Mo/Cu复合材料。还原态Mo骨架制备的Mo/Cu复合材料存在大颗粒Mo，周围弥散分布着因还原而生成的Mo微粒，而烧结态Mo骨架制备的Mo/Cu复合材料中Mo和Cu边界清晰，制备的Mo/Cu复合材料的硬度高于还原态。Mo/Cu复合材料的导热率、热膨胀系数随着测试温度和Cu含量的升高而增大。烧结态多孔Mo骨架制备的Mo/Cu复合材料的导热率比还原态低，而热膨胀系数比还原态高。 |
| 关 键 词： | 复合材料；多孔 Mo；Mo/Cu；熔渗；微观结构；火焰喷涂 |
| Title： | Effect of Skeleton Structure on the Properties of Mo/Cu Composites by Infiltrating Molten Cu into Flame-sprayed Prous Morous Mo Flame-Sprayed by Semi-molten Particles |
| Author： | YAO Jiantao, LI Yi, LI Changjiu, YANG Guanjun, LI Chengxin |
| Organization： | State Key Laboratory for the Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University |
| Abstract： | In this paper, Mo/Cu composites with high copper contents were manufactured by infiltrating molten copper into flame-sprayed porous molybdenum. Through sintering porous Mo flame-sprayed by following reduction treatment, the effect of the skeleton structure of porous Mo on the properties of the resultant Mo/Cu composites was examined. Results showed that molten copper can effectively infiltrate into flame-sprayed porous Mo to form dense Mo/Cu compoiste. Many small Mo particulates are satellited around large Mo particles in the Mo/Cu composites made from the as-reduced porous Mo, while the Mo/Cu composites made from the post-reduction sintered porous Mo present clear interfaces between Mo and Cu, which has a higher hardness. We found that the thermal conductivity and coefficient of thermal expansion of Mo/Cu composites increased with the increase of the Cu content and test temperature as well. With post-reduction sintering treatment to flame sprayed porous Mo, the Mo/Cu composite presents a lower thermal conductivity and higher coefficient of thermal expansion than that from as-reduced. |
| Key words： | composite material; porous Mo; Mo/Cu; melt infiltrating; microstructure; flame-spray |
| 发表期数： | 2016年9月第18期 |
| 引用格式： | 姚建洮，李 一，李长久，等. 火焰喷涂多孔Mo骨架结构对熔渗制备Mo/Cu复合材料性能的影响[J]. 中国科技论文在线精品论文，2016，9（18）：1840-1849. |
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