1. New Impact Resistance Bionic Composite Coating Inspired by Turtle Shell.
- Author
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Li, Zheng-yang, Cai, Zhen-bing, Zhou, Teng, Cui, Xue-jun, and Zhu, Min-hao
- Subjects
COMPOSITE coating ,BIONICS ,TURTLES ,DIAMOND-like carbon ,FORCE & energy ,SURFACE coatings - Abstract
The turtle has survived for over several hundred million years and evolved excellent shell structure to resist high-stress repeated impact by stone and predators. Based on the impact resistance performance of turtle shell, a new bionic composite coating (BCC) was proposed and prepared, which is composed of porous micro-arc oxidation (MAO) inner layer, Si transition middle layer, and different-element (H, Si, and Cr)-doped diamond-like carbon (DLC) outer layer. This study aims to investigate the impact response, energy absorption, and damage characteristics of BCC in low-speed impact conditions. Results indicate that the impact behavior of BCC is superior to substrate and the BCC presents a lower peak force and higher energy absorption. Thus, the outer DLC layer could resist the impact force to reduce damage. The porous structure in MAO layer could act as a buffer and deform to absorb energy. The BCC-Si shows the best impact resistance with the lowest wear volume due to the Si-DLC layer with a good balance of toughness and hardness. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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