以摻滲、燒結提高快速原型陶瓷工件之機械強度

Increasing Mechanical Strength of Ceramic Work Pieces by Infiltration and Sintering

邱顯懿(Shian-Yi Chiou)

指導教授 ： 湯華興 ； 汪家昌

國立臺北科技大學/機電學院/製造科技研究所/碩士(2008年)

摘要

本文在於研究以摻滲、燒結兩種後處理來提高快速原型陶瓷工件之機械強度，以氧化鋁陶瓷粉末為主基材，加上去離子水和分散劑作為第一階段的漿料調配，再利用部分鹼化型（型號BP-17）聚乙烯醇(PVA)作為漿料之黏結劑和潤滑劑，此為第二階段。將陶瓷漿料和黏結劑充分攪拌均勻後，即可進行鋪層實驗，依照最佳鋪層厚度來鋪在製程平台上。試片經緻密化燒結及摻滲後再利用3點抗彎強度試驗機來量測不同製程的抗彎強度。
本實驗大致上可分為兩個階段，第一為在氧化鋁陶瓷粉末中加入10wt%的奈米粉末，其顆粒大小為10nm到30m，利用奈米粉末粒徑細小、比表面積大的特性來進行緻密化燒結；第二階段為掺滲製程，先將試片經過軟燒結，再以自製玻璃以及鑭玻璃進行掺滲，再來探討以自製玻璃以及鑭玻璃為強化材料對於陶瓷試片的機械性質之影響。將試片利用3點抗彎強度試驗機來量測其抗彎強度可發現經由緻密化燒結的試片其平均抗彎強度可高達309.4MPa，掺滲過鑭玻璃之試片其平均抗彎強度可高達282.4MPa，掺滲過自製玻璃之試片其平均抗彎強度可高達198MPa。

關鍵字

奈米粉末 ； 摻滲 ； 緻密化燒結

並列摘要

The purpose of this study is to improve the bending stress of Rapid Prototyping ceramic work piece by sintering and infiltration. We use alumina powder, de-ionized water and dispersion as the first stage mixing slurry. We add part-alkalied PVA(BP-17) as the binder and lubricator of slurry as the second stage mixing slurry. We proceed to pave procedure after well-mixing ceramic slurry and binder. According to an optimal paving thickness without any crakes, paving was carried out by a RP machine. We measure the three-points bending stress of specimen which made by sintering and infiltration.
The experiment is divided into two parts, the first one is densification sintering which adds 10wt% nano powder in micro alumina ceramic powder, and the particle size of the nano powder is distributed between 10~30nm. Densification sintering was accomplished using the unique nano powder property of smaller particle size and bigger specific area. The second one is infiltration, in which the specimen was soft sintered and then infiltrated by lanthanum glass and self-made glass. We discuss the influence of self-made glass and lanthanum glass to the mechanical strength of ceramic work piece. Measuring the bending stress with three-point bending machine, we can find the average bending stress of work piece by densification sintering is 309.4MPa,by infiltration lanthanum glass is 282.4MPa,by infiltration self-made glass is 198MPa.

並列關鍵字

Nano Powder ； Infiltration ； Densification

參考文獻

[2] 張志誠，陶瓷工件之雷射燒結及摻滲，碩士論文，國立台北科技大學製造科技研究所，台北，2006。

[4] Tsung-Shou Yeh, Michael D. Sacks, "Effect of Particle Size Distribution on the Sintering of Alumina," Journal of the American Ceramic Society, vol. 71, no. 12, 1988, pp.484-487.

[6] Subramanian, N. Vail, J. Barlow, and H. Marcus, "Selective Laser Sintering of Alumna with Polymer Binders," Rapid Prototyping Journal, vol. 1, no. 2, 1995, pp.24-35.

[9] ndre’ Gahler and Juergen G. Heinrich, "Direct Laser Sintering of Al2O3–SiO2 Dental Ceramic Components by Layer-Wise Slurry Deposition," Journal of the American Ceramic Society, vol. 89, no. 10, 2006, pp.3076-3080.

[10] Horst Exner, Peter Regenfuss and Robby Ebert, "Principles of laser micro sintering," Rapid Prototyping Journal, vol. 13, no. 4, 2007, pp.204-212.