臺灣博碩士論文加值系統

本論文研究了通過在室溫下暴露於溴蒸氣來溴化碳-碳複合材料，對抑制碳-碳複合材料的氧化是有效的，該碳-碳複合材料的形式是浸漬有樹脂的PAN基碳纖維，隨後在1000或2000℃下碳化。溴化後碳-碳複合材料氧化率降低了43%。此外，電阻率降低了39%。但是，拉伸模量降低了16-17%，拉伸強度降低了17-20%。延展性不受影響。抗氧化性提高可能是由於溴的吸附或電子從石墨到溴的轉移。溴存在於複合材料的基質中而非纖維中，特別是存在於基質中的孔中。本研究通過用電化學方法嘗試溴化，但是導致碳-碳複合材料的重量吸收可忽略不計。

Bromination by exposure to bromine vapor at room temperature was effective for inhibiting the oxidation of carbon-carbon composites in the form of PAN-based carbon fibers impregnated with resin, which was subsequently carbonized at 1000 or 2000°C. The oxidation rate was decreased by up to 43%. In addition, electrical resistivity was decreased by up to 39%. However, the tensile modulus was decreased by 16–17% and tensile strength was decreased by 17–20%; the ductility was not affected. The increased oxidation resistance may be due to bromine adsorption or the electron transfer from graphite to bromine. The bromine resided in the matrix of the composite, particularly in pores within the matrix. Bromination was also attempted by the electrochemical method, but it resulted in negligible weight uptake in the carbon-carbon composite. Carbon-carbon composites that had been graphitized at 2700°C were damaged by bromination.

摘要………………………………………………………………………………i
Abstract…………………………………………………………………………ii
誌謝……………………………………………………………………………iv
目錄……………………………………………………………………………v
表目錄…………………………………………………………………………viii
圖目錄…………………………………………………………………………ix
第一章 緒論……………………………………………………………………1
1.1研究目的…………………………………………………………1
第二章 文獻探討………………………………………………………………4
2.1 溴（Bromine）……………………………………………………4
2.2四針探法…………………………………………………………4
2.2.1 掃描式電子顯微鏡(SEM)………………………………………6
2.2.2 X射線繞射儀（X-ray diffractometer，XRD）………………25
2.3 碳纖維(Carbon fiber)……………………………………………7
2.4 複合材料…………………………………………………………8
2.5 碳(Carbon)…………………………………………………………8
2.5.1碳的特性…………………………………………………………9
2.5.2 碳的應用………………………………………………………10
2.6 氯（Chlorine）…………………………………………………12
第三章實驗步驟 ……………………………………………………………13
3.1 實驗原料……………………………………………………………13
3.2 實驗程序……………………………………………………………9
1 碳-碳複合材料……………………………………………………13
2 重量攝取…………………………………………………………15
3 電阻率……………………………………………………………15
4 結構………………………………………………………………16
5 抗氧化性…………………………………………………………18
6 溫度掃描模式……………………………………………………20
7 等溫模式…………………………………………………………22
8 基質和纖維束分開………………………………………………24
3.3 分析軟體……………………………………………………………25
(1) MATLAB起源……………………………………………………27
(2) 優勢特點…………………………………………………………27
(3) 重要功能…………………………………………………………28
第四章 結果與討論…………………………………………………………29
4.1抗氧化性………………………………………………………………29
4.2氧化速率………………………………………………………………32
4.3 機械性能……………………………………………………………34
4.4碳-碳複合材料2700℃下石墨化的影響……………………………36
第五章 結論…………………………………………………………………39
參考文獻………………………………………………………………………40
Extended Abstract………………………………………………………………31

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