本文目的為使用熱固性聚合物酚醛樹脂做為黏結氧化鋁陶瓷粉末之黏結劑,替代耐水性與強度均不足的熱塑性聚合物,以快速原型製程製出陶瓷試片且分析其內部微結構並測試其機械性質。 本研究發現若僅添加酚醛樹脂為黏結劑,其固體含量不得少於要7wt%,試片才不會在鋪層乾燥時產生龜裂。以3.5 wt%:2 wt%之酚醛樹脂與PVA之混合比可鋪出光滑的表面。最後,以快速原型製程製作出陶瓷生坯工件,測得生坯工件平均緻密度達59.7085%,比添加其它黏結劑所製作之生坯工件都還高。由三點抗彎實驗得到生坯工件平均強度為29.14MPA,所以在清料時工件不易損壞。經高溫1600℃燒結緻密化後強度為445.612MPA。
The purpose of this research focuses on using phenolic resin, which is a thermosetting polymer, as a binder of aluminum oxide (Al2O3) powders to replace thermoplastics polymer for, lack of waterproof and strength. With the process of rapid prototyping, the inner microstructures and the mechanical properties of the ceramic specimens were investigated. We found that the solid content of the phenolic resin must be no less than 7wt% to prevent cracks occurred during layer drying. A smooth surface of the layer can be obtained when the ratio of phenolic resin and PVA was 3.5 wt% to 2 wt%. Eventually, the average density of ceramic green parts fabricated with the RP process was around 59.7%, which was higher than that of the green parts made of the material with other binders. The average strength of green part of 29.14MPA was achieved with three-point bending test. Therefore, the green parts were not damaged during un-scanned material removal. After sintering and densification at 1600℃ the average strength was 445.612MPA.
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