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題 名 | 電泳沉積法製備熔融石英精密鑄造陶殼模面層=Using Fused Silica as the Primary Coat of Ceramic Shell Mold for Investment Casting by Electrophoretic Deposition |
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作 者 | 蔡佳洲; 楊國和; | 書刊名 | 鑄造工程學刊 |
卷 期 | 38:3=154 2012.09[民101.09] |
頁 次 | 頁30-37 |
分類號 | 472.2 |
關鍵詞 | 電泳沉積; 精密鑄造; 熔融石英; 陶殼模; 表面粗糙度; Electrophoretic deposition; Investment casting; Fused Silica; Ceramic shell mold; Surface roughness; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究是應用電泳沉積法製備熔融石英精密鑄造陶殼模面層來改善粉體顆粒排列狀態以達到良好的被覆效果。本法的優點有製程簡易、設備成本低廉、高沉積速率、表面精度高、可以被覆各種表面形狀複雜之導電基材等。本研究擬在導電塑膠基材表面以電泳沉積方式沉積熔融石英陶殼模面層,待其乾燥後再反覆沾漿、淋砂、乾燥等作業,得到一定厚度之陶殼模。電泳沉積法探討電壓、電流、時間、pH值、粉體濃度及添加劑對沉積重量及薄膜厚度等影響。因粉體間的鍵結強度低導致電泳層易剝落,故添加高分子材料以化學鍵結方式增加電泳層附著能力。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。 |
英文摘要 | Fused silica has been used as the primary coat for investment casting by electrophoretic deposition (EPD). With the application of EPD, the arrangement of powder particles was improved to acquire a better surface roughness. The EPD process has the following advantages, such as: simple facility, low cost, high deposition rate, high surface finish and a variety of complex surface shape of conductive substances can be coated. In this study, EPD process was used to fabricate a fused silica primary coat on the conductive plastic, and was set for drying. Then, the conventional shell building process, i.e., dipping, stuccoing and drying were practiced and repeated for several times to obtain a certain thickness as the backup layers for the ceramic shell mold. The effects of applied voltage, current, time, pH, powder concentration and additives on deposition weight and thickness were studied. Owing to the low bonding strength of the powder, the EPD layer is easily to peel off; therefore, to increase the adhesion force of the layer by chemical bond, the polymer material has been added. The surface roughness, modulus of rupture (MOR, high temperature strength and fired strength) and high temperature permeability of the ceramic shell mold were examined. |
本系統中英文摘要資訊取自各篇刊載內容。