Page 69 - 《摩擦学学报》2021年第4期

第 41 卷 第 4 期 摩 擦 学 学 报 Vol 41 No 4
2021 年 7 月 Tribology Jul, 2021

DOI: 10.16078/j.tribology.2020273

泡沫镍/聚氨酯双连续复合材料的

液滴冲蚀行为研究

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王俊翔 , 杨晓光 , 薛伟海 , 戴智鑫 , 李 曙 , 段德莉 1,2*
(1. 中国科学院金属研究所，辽宁 沈阳 110016;
2. 中国科学技术大学 材料科学与工程学院，安徽 合肥 230026)
摘 要: 利用液滴冲蚀试验装置，开展了泡沫镍/聚氨酯双连续复合材料和纯聚氨酯的液滴冲蚀试验研究，并采用
PIV系统，测量了液滴冲蚀中液滴速度和直径. 结果表明：随着冲击能量的增加，复合材料表现出比纯聚氨酯更好的
抗液滴冲蚀性能；泡沫镍结构参数对复合材料的液滴冲蚀行为有重要影响，泡沫镍孔径越小、体密度越大，复合材
料的抗冲蚀能力越强；密集的金属骨架能有效阻挡高速液滴的破坏作用，并为树脂基体提供较强的阴影保护效应和
地毯保护效应，显著提高复合材料的抗冲蚀性能.
关键词: 液滴冲蚀; 双连续复合材料; PIV; 聚氨酯; 泡沫镍
中图分类号: TH117.3 文献标志码: A 文章编号: 1004-0595(2021)04–0512–10

Droplet Erosion Behavior of Nickel Foam/Polyurethane
Co-continuous Composite

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WANG Junxian , YANG Xiaoguang , XUE Weihai , DAI Zhixin , LI Shu , DUAN Deli 1,2*
(1. Institute of Metal Research, Chinese Academy of Sciences, Liaoning Shenyang 110016, China
2. School of Materials Science and Engineering, University of Science and Technology of China,
Anhui Hefei 230026, China)
Abstract: The Ni foam/polyurethane(PU) co-continuous composites (100PPI 0.8/PU, 50PPI 2.3/PU, 50PPI 1.3/PU,
50PPI 0.5/PU, 25PPI 1.7/PU and 25PPI 0.8/PU) were prepared by vacuum feeding method. The different co-continuous
composites were named after pore size, volume density of the Ni foams with PU. According to ASTM standard G73-98,
the high-speed droplet erosion device was purchased and modified. The plunger pump fed water into the pipeline, and
the nozzle obtained liquid flow of different flow rates by adjusting the diverter valve. When the liquid flow was ejected
from the nozzle, it was constrained by two parallel walls, and it scattered in a fan shape. The three test conditions of
pipeline pressure 6.9 MPa, 8.3 MPa, 10.3 MPa for 30 min were chosen to conduct droplet erosion tests on the
composites and pure PU. The PIV (particle image velocimetry) system was used to measure the velocity and size of the
droplets. The PIV system was mainly composed of a laser generator, a camera, a synchronization controller and a
computer. The laser generator emitted two slender, vertical laser beams, hitting the droplets below the nozzle. The
synchronization controller enabled the camera to capture images and get two photos. Knowing the time interval of the
two lasers and comparing the overall movement distance of the particles in the two photos, the velocity of the droplets
could be calculated by the software Insight 4G. At the same time, the software Insight 4G recognized the droplet
particles in the photo and could measure the droplet size.

Received 7 November 2020, revised 9 February 2021, accepted 10 February 2021, available online 28 July 2021.
*Corresponding author. E-mail: duandl@imr.ac.cn, Tel: 86-24-23971773.
This project was supported by the National Natural Science Foundation of China (51275506) and National Youth Science
Foundation of China (51801207).
国家自然科学基金(51275506)和国家青年科学基金(51801207)项目资助.