{"title":"通过加强筋的径向结构设计实现石墨鳞片/铜复合材料的各向同性热性能","authors":"","doi":"10.1016/j.coco.2024.102026","DOIUrl":null,"url":null,"abstract":"<div><p>Conventional graphite flakes (GFs)/Cu composites suffer from severe anisotropy in terms of their thermal conductivity (TC) and coefficient of thermal expansion (CTE) between the in-plane and through-plane directions, which as thermal management materials (TMMs) play crucial roles in the overall heat dissipation performance of electronic components. To address this issue, a radial structural design for the reinforcement phase of GFs was developed. In this study, conventional stacked structured GFs/Cu composites and newly designed radial structured GFs/Cu composites were prepared by electroless plating of Cu on the surface of GFs followed by fast hot-pressing technology. The GFs content was varied from 30 to 70 vol%. The spatial orientation of the GFs was determined via X-ray computed tomography. For the radial structured GFs/Cu composites, the CTE were 11.52 and 14.42 ppm K<sup>−1</sup> in the in-plane direction through-plane direction when the GFs content was 50 vol%, and the TC reached maximum values of 681 and 590 W m<sup>−1</sup> K<sup>−1</sup> in the in-plane direction and through-plane direction when the GFs content was 50 vol%. The TC in the through-plane direction was nine times greater than that of the stacked structured GFs/Cu composites (65 W m<sup>−1</sup> K<sup>−1</sup>) at the same GFs content, demonstrating overall isotropy. Although radial structured GFs/Cu composites have more defects that can affect their thermal properties due to process factors, they have better heat dissipation abilities in practical applications; this indicates their great potential as a new generation of TMMs.</p></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":null,"pages":null},"PeriodicalIF":6.5000,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Achieving isotropic thermal properties in graphite flake/Cu composites through the radial structural design of reinforcement\",\"authors\":\"\",\"doi\":\"10.1016/j.coco.2024.102026\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Conventional graphite flakes (GFs)/Cu composites suffer from severe anisotropy in terms of their thermal conductivity (TC) and coefficient of thermal expansion (CTE) between the in-plane and through-plane directions, which as thermal management materials (TMMs) play crucial roles in the overall heat dissipation performance of electronic components. To address this issue, a radial structural design for the reinforcement phase of GFs was developed. In this study, conventional stacked structured GFs/Cu composites and newly designed radial structured GFs/Cu composites were prepared by electroless plating of Cu on the surface of GFs followed by fast hot-pressing technology. The GFs content was varied from 30 to 70 vol%. The spatial orientation of the GFs was determined via X-ray computed tomography. For the radial structured GFs/Cu composites, the CTE were 11.52 and 14.42 ppm K<sup>−1</sup> in the in-plane direction through-plane direction when the GFs content was 50 vol%, and the TC reached maximum values of 681 and 590 W m<sup>−1</sup> K<sup>−1</sup> in the in-plane direction and through-plane direction when the GFs content was 50 vol%. The TC in the through-plane direction was nine times greater than that of the stacked structured GFs/Cu composites (65 W m<sup>−1</sup> K<sup>−1</sup>) at the same GFs content, demonstrating overall isotropy. Although radial structured GFs/Cu composites have more defects that can affect their thermal properties due to process factors, they have better heat dissipation abilities in practical applications; this indicates their great potential as a new generation of TMMs.</p></div>\",\"PeriodicalId\":10533,\"journal\":{\"name\":\"Composites Communications\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.5000,\"publicationDate\":\"2024-08-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Composites Communications\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2452213924002171\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, COMPOSITES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Composites Communications","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2452213924002171","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, COMPOSITES","Score":null,"Total":0}
Achieving isotropic thermal properties in graphite flake/Cu composites through the radial structural design of reinforcement
Conventional graphite flakes (GFs)/Cu composites suffer from severe anisotropy in terms of their thermal conductivity (TC) and coefficient of thermal expansion (CTE) between the in-plane and through-plane directions, which as thermal management materials (TMMs) play crucial roles in the overall heat dissipation performance of electronic components. To address this issue, a radial structural design for the reinforcement phase of GFs was developed. In this study, conventional stacked structured GFs/Cu composites and newly designed radial structured GFs/Cu composites were prepared by electroless plating of Cu on the surface of GFs followed by fast hot-pressing technology. The GFs content was varied from 30 to 70 vol%. The spatial orientation of the GFs was determined via X-ray computed tomography. For the radial structured GFs/Cu composites, the CTE were 11.52 and 14.42 ppm K−1 in the in-plane direction through-plane direction when the GFs content was 50 vol%, and the TC reached maximum values of 681 and 590 W m−1 K−1 in the in-plane direction and through-plane direction when the GFs content was 50 vol%. The TC in the through-plane direction was nine times greater than that of the stacked structured GFs/Cu composites (65 W m−1 K−1) at the same GFs content, demonstrating overall isotropy. Although radial structured GFs/Cu composites have more defects that can affect their thermal properties due to process factors, they have better heat dissipation abilities in practical applications; this indicates their great potential as a new generation of TMMs.
期刊介绍:
Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.