Influence of compaction pressure and pre-sintering temperature on the machinability of zirconia ceramic.

Author: Huil HUANG ¹ ; Jing LI ; Fuqiang ZHANG ; Jing SUN ; Lian GAO
Author Information

1. Dept. of Prosthodontics, The Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, China.
Publication Type:Journal Article
MeSH: Ceramics; Temperature; Yttrium; Zirconium
From: West China Journal of Stomatology 2011;29(5):534-541
CountryChina
Language:Chinese
Abstract:
OBJECTIVEIn order to make certain the compaction pressure as well as pre-sintering temperature on the machinability of the zirconia ceramic.
METHODS3 mol nano-size 3 mol yttria partially stabilized zirconia (3Y-TZP) powder were compacted at different isostatic pressure and sintered at different temperature. The cylindrical surface was traversed using a hard metal tool. Surface and edge quality were checked visually using light stereo microscopy.
RESULTSPre-sintering temperature had the obviously influence on the machinability of 3Y-TZP. The cutting surface was smooth, and the integrality of edge was better when the pre-sintering temperature was chosen between 800 degrees C to 900 degrees C. Compaction pressure showed only a weak influence on machinability of 3Y-TZP blanks, but the higher compaction pressure result in the poor surface quality.
CONCLUSIONThe best machinability of pre-sintered zirconia body was found for 800-900 degrees C pre-sintering temperature, and 200-300 MPa compaction pressure.