Additive manufacturing of zirconia parts by indirect selective laser sintering

详细信息    查看全文

• 作者：Khuram Shahzad ; Jan Deckers ; Zhongying Zhang ; Jean-Pierre Kruth ; Jef Vleugels
• 关键词：Additive manufacturing ; Indirect selective laser sintering ; Zirconia ; Polymer/ceramic microspheres
• 刊名：Journal of the European Ceramic Society
• 出版年：2014
• 出版时间：January, 2014
• 年：2014
• 卷：34
• 期：1
• 页码：81-89
• 全文大小：3294 K

文摘

Thermally induced phase separation (TIPS) was used to produce spherical polypropylene-zirconia composite powder for selective laser sintering (SLS). The influence of the composition of the composite starting powder and the SLS parameters on the density and strength of the composite SLS parts was investigated, allowing realizing SLS parts with a relative density of 36 % . Pressure infiltration (PI) and warm isostatic pressing (WIPing) were applied to increase the green density of the ZrO₂-PP SLSed parts. Infiltrating the SLS parts with an aqueous 30 vol. % ZrO₂ suspension allowed to increase the sintered density from 32 to 54 % . WIPing (135 ¡ãC and 64 MPa) of the SLS and SLS/infiltrated complex shape green polymer-ceramic composite parts prior to debinding and sintering allowed raising the sintered density of the 3 mol Y₂O₃ stabilized ZrO₂ parts to 92 and 85 % , respectively.