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Korean Journal of Metals and Materials > Volume 55(6); 2017 > Article
Korean Journal of Metals and Materials 2017;55(6): 446-452. doi: https://doi.org/10.3365/KJMM.2017.55.6.446
AlN입자 함유 폴리머 후막을 Al기판에 형성한 2층 층상재료의 두께 방향에 대한 열전도 특성
김종구1, 주재훈2, 한병동3, 박상희4, 조영래1
1부산대학교 재료공학부
2부산대학교 수송기기하이테크소재부품전공
3한국기계연구원 부설 재료연구소
4가야대학교 안경광학과
Thermal Properties of Two-Layered Materials Composed of Polymer Layer Embedded with AlN Particles on Al Substrate along the Thickness Direction
Jong-Gu Kim1, Jae-Hoon Ju2, Byung-Dong Hahn3, Sang-Hee Park4, Young-Rae Cho1
1Division of Materials Science and Engineering, Pusan National University, Busan 46287, Republic of Korea
2Department of Advanced Materials and Parts of Transportation Systems, Pusan National University, Busan 46287, Republic of Korea
3Korea Institute of Materials Science, Changwon 51508, Republic of Korea
4Department of Ophthalmic Optics, Kaya University, Gyeongnam 50830, Republic of Korea
Correspondence  Young-Rae Cho ,Tel: +82-51-510-2389, Email: yescho@pusan.ac.kr
Received: 6 October 2016;  Accepted: 10 December 2016.  Published online: 1 June 2017.
ABSTRACT
The thermal properties of two-layered materials composed of a polymer layer embedded with dielectric AlN particles (AlN composite) coated on top of an aluminum (Al) substrate were investigated by light flash analysis (LFA). The thermal conductivity of the specimens was measured as a function of the AlN composite volume fraction along the thickness direction. By observing the microstructure of the two-layered materials in cross section, we found a tremendous number of randomly distributed pores and boundaries in the AlN composite. Compared to the conventional thermal resistor model, the thermal conductivity values of the specimens measured by LFA were significantly different. When the solid solution model was applied in this study, however, the measured thermal conductivity of the specimens showed good agreement with the values from the solid solution model. The good agreement in thermal conductivities for the specimens was due to the presence of many randomly distributed pores and boundaries in the AlN composite.
Keywords: thermal conductivity, layered materials, thick film, thickness direction, thermal property
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