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題 名 | 以環繞電極進行電泳沉積製備精密鑄造面層陶殼模=Fabrication of the Primary Coat of Ceramic Shell Mold for Investment Casting by Using Electrophoretic Deposition with Cylindrical Electrode |
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作 者 | 陳進昌; 蔡佳洲; 楊國和; | 書刊名 | 鑄造工程學刊 |
卷 期 | 37:4=151 2011.12[民100.12] |
頁 次 | 頁1-10 |
分類號 | 472.22 |
關鍵詞 | 電泳沉積; 精密鑄造; 氧化鋁; 陶殼模; 表面粗度; Eletrophoretic deposition; Precision casting; Al₂O₃; Ceramic shell mold; Surface roughness; |
語 文 | 中文(Chinese) |
中文摘要 | 精密鑄造製程中,面層陶殼模與鑄件表面精度息息相關。因電泳沉積法具備設備簡單、低成本、具高沉積速率、表面精度高等優點,目前廣泛應用於陶瓷薄膜製作。本研究擬在實體導電塑膠基材以電泳沉積方式沉積Al2O3面層陶殼模,待其乾燥後再反覆進行沾漿、淋砂、乾燥等作業以得具有一定厚度之陶殼模。本文並探討輸出電壓、沉積時間對沉積行為的影響及討論沉積厚度對透氣度的影響,最後製備陶殼模進行澆鑄作業。應用表面粗度儀、破斷強度試驗機及高溫透氣度機量測陶殼模之表面粗糙度、破斷強度 ( 高溫強度、殘留強度) 和透氣度,最後量測鑄件表面粗度值。實驗結果得知透氣度隨沉積厚度增加而增加。相同粒徑於電泳沉積製程所製備之陶殼模與一般傳統沾漿、淋砂方式相較之下,電泳沉積法製備之陶殼模表面粗度較佳 (0.17μm),在機械性能方面兩製程之破斷強度相差不大,鑄件表面粗度則以電泳沉積法製備者較佳 (0.97μm)。 |
英文摘要 | The surface roughness of casting is dependent on the primary coat of ceramic shell mold in the precision metal casting process. And the electrophoretic deposition (EPD) process has the following advantages, such as: simple facility, low cost, high deposition rate and high surface finish, therefore, this process has been widely applied to the fabrication of ceramic film. In this study, the EPD process was prepared to deposit the Al2O3 primary coat on the surface of the solid conductive plastics substrate. Then, the conventional dipping, stuccoing and drying operation of lost wax process were practiced repeatedly to build a certain thickness of ceramic shell mold. The effects of applied voltage, deposition time on the deposition behavior were also studied. The effect of thickness on permeability of ceramic shell mold was also studied. After the ceramic shell mold was prepared, the metal casting practice was operated. The surface roughness tester, modulus of rupture (MOR) measurement apparatus and high temperature permeability measurement apparatus were applied to measure the surface roughness, rupture strengths (high temperature strength and fired strength) and high temperature permeability of the ceramic shell mold; then, the surface roughness of the casting was also measured, too. The results showed: The permeability of ceramic shell mold was increased with the increase of the deposition thickness. With the same grain size of refractory, the surface of the ceramic shell mold fabricated by EPD process showed better surface roughness than that of the conventional shell building operation. As to the MOR, there was no significant difference between these two processes. The surface of the casting prepared by the EPD process had the superior surface roughness. |
本系統中英文摘要資訊取自各篇刊載內容。