US 12,305,012 B2
Method for preparing internal laser induced carbonization layer of aramid fiber resin matrix composite
Yunxia Ye, Zhenjiang (CN); Zhao Yuan, Zhenjiang (CN); Guanglei Chen, Zhenjiang (CN); Xudong Ren, Zhenjiang (CN); and Yinqun Hua, Zhenjiang (CN)
Assigned to JIANGSU UNIVERSITY, Zhenjiang (CN)
Appl. No. 18/279,074
Filed by JIANGSU UNIVERSITY, Zhenjiang (CN)
PCT Filed Mar. 24, 2023, PCT No. PCT/CN2023/083622
§ 371(c)(1), (2) Date Aug. 28, 2023,
PCT Pub. No. WO2023/193614, PCT Pub. Date Oct. 12, 2023.
Claims priority of application No. 202210359040.X (CN), filed on Apr. 7, 2022.
Prior Publication US 2025/0019510 A1, Jan. 16, 2025
Int. Cl. C08J 7/12 (2006.01); B23K 26/53 (2014.01); H05K 3/10 (2006.01)
CPC C08J 7/123 (2013.01) [B23K 26/53 (2015.10); H05K 3/105 (2013.01); C08J 2363/00 (2013.01); C08J 2377/10 (2013.01); H05K 2203/107 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for preparing an internal laser-induced carbonization layer of an aramid fiber resin matrix composite, the aramid fiber resin matrix composite comprising a surface resin layer on the upper surface and an aramid fiber layer under the surface resin layer, comprising the following steps:
step 1: wiping a surface of an aramid fiber resin matrix composite material sample to ensure that there is no stain on the surface of the aramid fiber resin matrix composite material sample;
step 2: placing the aramid fiber resin matrix composite material sample on a laser sample platform, wherein a defocusing amount between a laser focus and the upper surface of the aramid fiber resin matrix composite material sample is negative, so that the laser focus is located in an internal horizontal plane of the aramid fiber resin matrix composite material sample; and
step 3: using low power and high speed infrared picosecond laser to scan the aramid fiber resin matrix composite material sample for several times; setting a specific scanning processing path to carbonize the aramid fiber layer without damaging the surface resin layer of the aramid fiber resin matrix composite material sample under a condition of high temperature and hypoxia, to form a specific carbonization line.