陶瓷雷射燒結法工件之燒結精度研究

Study on Precision of Sintered Parts Fabricated with Ceramic Laser Sintering

黃智德(Chih-De Huang)

指導教授 ： 湯華興 ； 嚴孝全

國立臺北科技大學/機電學院/製造科技研究所/碩士(2010年)

https://doi.org/10.6841/NTUT.2010.00380

摘要

本文的目的為以陶瓷雷射燒結製程製作工件之燒結精度研究，將著重在燒結收縮誤差。係以0.3μm球形氧化鋁粉末或0.5μm不規則形氧化鋁粉末以黏結劑(聚乙烯醇或聚乙烯醇與戊二醛)調製漿料，製作快速原型陶瓷試塊，應用微小維克氏硬度機打印刻痕及封蠟法與阿基米德原理，量測生坯塊及生工件燒結前後，試片各區域之打印刻痕距離與緻密度，探討不同粒徑大小及形狀對生坯塊及雷射掃描生工件各區域X、Y、Z三個軸向的收縮率標準差及緻密度標準差的影響，及了解由不同黏結劑製作陶瓷試塊之收縮率，作為建構3D模型時補償收縮尺寸之參考。
研究結果顯示：(1) 0.3μm球形氧化鋁以黏結劑(聚乙烯醇)製作生坯塊及生工件X與Y軸收縮率分別約為25.3%、25.7%，以黏結劑(聚乙烯醇與戊二醛)之X、Y、Z收縮率分別約為22.5%、23%、24.5%；兩種不同黏結劑之生坯塊及生工件各軸收縮率標準差約為0.05%~0.16%，燒結前後緻密度標準差約為0.05%~0.17%。(2) 0.5μm不規則形氧化鋁以黏結劑(聚乙烯醇)製作生坯塊及生工件X與Y軸收縮率分別約為17.5%、17.5%，以黏結劑(聚乙烯醇與戊二醛)之X、Y、Z收縮率分別約為20.4%、20.6%、22.6%，兩種不同黏結劑之生坯塊及生工件，各軸收縮率標準差約為0.25%~0.33%，燒結前後緻密度標準差約為0.22%~0.32%。由結果證明，選擇0.3μm球形氧化鋁粉末調製漿料，製作快速原型陶瓷工件，能有效地降低收縮率的標準差與緻密度的標準差，提高快速原型陶瓷工件的良率。

關鍵字

快速原型 ； 陶瓷雷射燒結 ； 陶瓷工件 ； 精度

並列摘要

The aim of this paper is to study on precision of sintered parts fabricated with ceramic laser sintering, which is focus on the sintering shrinkage error. Using spherical alumina powder or alumina powder with irregular-shaped whose diameter is 0.3μm or 0.5μm made slurry with binder (polyvinyl alcohol or polyvinyl alcohol and glutaraldehyde), fabricated ceramic blocks. We employ micro-Vickers Hardness tester print nicks, sealing wax and the Archimedes principle to measured green blocks and green parts before and after sintering, the displacement from various regions of the notch and compact density. Discussing the effect of laser scanning green parts whole region and X, Y, Z three axis standard deviation of shrinkage and standard deviation of density with different particle size and shape, understanding the shrinkage of ceramic parts fabricated with different binder, and was employed as a 3D model shrinkage compensation size reference.
Results show that: (1) 0.3μm spherical alumina with binder (polyvinyl alcohol) was employed to fabricated green blocks and laser scanned green parts whose shrinkage rate are about 25.3%, 25.7% respectively on X,Y axial direction, and with binder (polyvinyl alcohol and glutaraldehyde) whose the X, Y, Z axial direction shrinkage rate are about 22.5%, 23%, 24.5%. Standard deviation of the axial shrinkage rate is about 0.05%~0.16% by different ceramic parts with different binders. Before and after sintering standard deviation of density are about 0.05%~0.17%. (2) 0.5μm irregular-shaped alumina with binder (polyvinyl alcohol) was employed to fabricated green blocks and laser scanned green parts whose shrinkage rate are about 17.5%, 17.5% respectively on X,Y axial direction, and with binder (polyvinyl alcohol and glutaraldehyde) for X, Y, Z shrinkage rate are about 20.4%, 20.6%, 22.6%. Standard deviation of the axial shrinkage rate is about 0.25%~0.33 % by different workpiece with different binders. Before and after sintering standard deviation of density are about 0.22%~0.32%. The results show that selecting the 0.3μm spherical alumina powder prepared slurry to fabricate rapid prototyping ceramic parts which can effectively reduce standard deviation of shrinkage rate and density, and increase yield of rapid prototyping ceramic parts.

並列關鍵字

rapid prototyping ； ceramic laser sintering ； ceramic part ； precision

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