| 研究生: |
何宜儒 Ho, Yi-Ru |
|---|---|
| 論文名稱: |
碳材料在氟化鹽類中的靜態腐蝕與沖蝕研究 Study on static corrosion and erosion in Flinak of carbon material |
| 指導教授: |
朱建平
Ju, Chien-Ping 陳瑾惠 Chern Lin, Jiin-Huey |
| 共同指導教授: |
李國榮
Lee, Kuo-Jung |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 材料科學及工程學系 Department of Materials Science and Engineering |
| 論文出版年: | 2012 |
| 畢業學年度: | 100 |
| 語文別: | 中文 |
| 論文頁數: | 157 |
| 中文關鍵詞: | 碳/碳複合材料 、石墨 、熔鹽 、靜態腐蝕 、動態沖蝕 |
| 外文關鍵詞: | carbon/carbon composite, graphite, molten salt, corrosion, erosion |
| 相關次數: | 點閱:78 下載:0 |
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本實驗針對孫銘弘學長的製程在針軋方式與碳化速率做改進,希望能增加碳/碳複合材料的性質,並對其進行密度、孔隙率、機械性質等分析。此外也選用核能級石墨與工業級高密度石墨作為碳/碳複合材料的對照組,藉此分析經過表面處理的碳/碳複合材料(以密封層披覆在碳/碳複合材料表面)在靜態腐蝕與沖蝕中的試片情形。並評估此類碳/碳複合材料應用於熱交換器的可行性。
由實驗結果顯示,碳/碳複合材料經過比較緻密的針軋方式與比較慢的碳化速率,可以提升碳/碳複合材料的密度與抗彎強度,並降低孔隙率,唯獨韌性有下降的趨勢。而經過表面處理的碳/碳複合材料對於防止氟化鹽類的滲漏有非常良好的表現,且密封材在經過沖蝕試驗後並未發現被破壞的情形,並且氟化鹽類對於密封材的附著性非常低。
綜合實驗結果發現,經過表面處理的碳/碳複合材料均可通過Flinak的密封性測試,並且對於抗腐蝕與沖蝕能力非常優良,極具應用於熱交換器的潛力。
In this study, to improve the needle method and the carbonization rate of Ming-Hung Sun senior for increasing the mechanical properties of carbon / carbon composites, and it is investigated such as density, porosity, and flexural strength. Moreover, I choose nuclear grade graphite and high density graphite as an experiment comparison of carbon / carbon composites to investigate the effect that tested by static corrosion and erosion in Flinak. And to assess the feasibility of this type of carbon / carbon composite material used in heat exchangers.
The results indicate that carbon / carbon composites which has batter needle process and slower carbonization rate can improve the density and flexural strength, and decrease the porosity. Only the toughness has a downward trend. On the other hand, the carbon/carbon composite which is coated the grafoil on surface has an excellent hermetic properties to prevent the leakage of Flinak, and Flinak is very low adhesion of the grafoil.
Consequently, carbon / carbon composites with surface treatment can pass the hermetic test in Flinak, and it has an excellent ability to prevent static corrosion and erosion, It shows the potential to apply heat exchanger tube
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校內:2017-08-29公開