In order to obtain an increased through-thickness thermal conductivity in carbon fiber reinforced composites, a novel method using heterogeneously structured resin with conductive filler was studied. Samples were produced using an alternating line pattern deposition of a highly concentrated silver-resin mixture and the neat resin. Microstructures and properties of the resulting composites were compared to those of a homogeneously dispersed filler matrix composite of similar loadings. Two different sets of pattern sample composites were produced using similar methods, but one used a manually deposited pattern method of depositing the resin, and the other used a dispenser. Both produced repeatable results which were comparable to each other, but the dispenser allowed for more uniform line deposition. The thermal diffusivity and conductivity of the resultant composites were measured by use of the LFA 457 Microflash device, and tensile and flexural tests were also conducted to obtain their mechanical properties. The results show that using a heterogeneously structured resin matrix with conductive filler on the composite leads to a significant increase in thermal conductivity over the homogeneous counterpart of the same loading, and an even greater increase over the neat carbon fiber/epon 862 composite. Through-thickness thermal conductivity in excess of 5 W/m K was obtained by using a 9 wt% silver loading heterogeneous composite. Also the mechanical properties of higher filler loading composites were comparable between the heterogeneously structured matrix and the homogeneously structured matrix composites. / A Thesis submitted to the Program in Materials Science in partial fulfillment of the requirements for the degree of Master of Science. / Summer Semester, 2012. / April 20, 2012. / Carbon Fiber, Composites, Heterogeneous, Silver, Thermal Conductivity, Through-Thickness / Includes bibliographical references. / Zhiyong Liang, Professor Directing Thesis; Tao Liu, Committee Member; James Brooks, Committee Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_185036 |
| Contributors | Gallagher, Daniel Peter (authoraut), Liang, Zhiyong (professor directing thesis), Liu, Tao (committee member), Brooks, James (committee member), Program in Materials Science (degree granting department), Florida State University (degree granting institution) |
| Publisher | Florida State University, Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text |
| Format | 1 online resource, computer, application/pdf |
| Rights | This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. |
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