US 11,952,666 B2
Preparation method for wear-resistant coating on cylindrical inner wall surface of aluminum alloy
Haoliang Tian, Beijing (CN); Yang Yu, Beijing (CN); Changliang Wang, Beijing (CN); Mengqiu Guo, Beijing (CN); Zimin Zhou, Beijing (CN); Zhihui Tang, Beijing (CN); Ang Zhang, Beijing (CN); Yongjing Cui, Beijing (CN); Tianying Wang, Beijing (CN); and Junguo Gao, Beijing (CN)
Assigned to AECC BEIJING INSTITUTE OF AERONAUTICAL MATERIALS, Beijing (CN)
Appl. No. 17/420,516
Filed by AECC BEIJING INSTITUTE OF AERONAUTICAL MATERIALS, Beijing (CN)
PCT Filed Jun. 17, 2020, PCT No. PCT/CN2020/000140
§ 371(c)(1), (2) Date Jul. 2, 2021,
PCT Pub. No. WO2021/012627, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 201910660775.4 (CN), filed on Jul. 22, 2019.
Prior Publication US 2021/0388506 A1, Dec. 16, 2021
Int. Cl. C23C 30/00 (2006.01); B22F 1/052 (2022.01); B22F 1/10 (2022.01); B22F 1/102 (2022.01); B22F 1/107 (2022.01); B22F 1/12 (2022.01); C09D 5/00 (2006.01); C09D 131/04 (2006.01); C22C 9/00 (2006.01); C23C 24/10 (2006.01); C08K 3/00 (2018.01)
CPC C23C 30/00 (2013.01) [B22F 1/052 (2022.01); B22F 1/10 (2022.01); B22F 1/102 (2022.01); B22F 1/107 (2022.01); B22F 1/12 (2022.01); C09D 5/00 (2013.01); C09D 131/04 (2013.01); C22C 9/00 (2013.01); C23C 24/103 (2013.01); C08K 3/00 (2013.01); C08K 2201/005 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for generating a wear-resistant coating on a cylindrical inner surface of an aluminum alloy workpiece, comprising:
mixing 0.1-0.5 wt % of a graphene powder and 99.5-99.9 wt % of an Al powder, the graphene powder has a lamellar structure with a thickness of 1-5 nm;
combining 12-18 wt % of the mixed graphene powder and the Al powder, 62-65 wt % of an Fe2O3 powder, 7-9 wt % of a ZnO powder, 1-3 wt % of a SiO2 powder, 1-3 wt % of a B2O3 powder, and 2-17 wt % of a Cu—Ti alloy powder to obtain a mixed powder, wherein the Cu—Ti alloy powder include 95 wt % of Cu and 5 wt % of Ti;
combining the mixed power powder with a polyvinyl alcohol (PVA) liquid, heating at 82-85° C., and performing spray granulation to obtain a low-temperature self-propagating composite;
stirring a slurry comprising the low-temperature self-propagating composite and sodium silicate;
injecting the slurry into a cylindrical inner cavity of an aluminum alloy workpiece, the aluminum alloy workpiece is mounted on a horizontal rotary table for rotation and is heated with the rotation at 80-100° C. such that the slurry is uniformly solidified on the cylindrical inner surface of the cylindrical inner cavity; and
burning the slurry, after the slurry is uniformly solidified and while the rotation is maintained, with an oxyacetylene flame to form the wear-resistant coating.