title: [Influence of compaction pressure and pre-sintering temperature on the machinability of zirconia ceramic].
abstract: OBJECTIVE
  In order to make certain the compaction pressure as well as pre-sintering temperature on the machinability of the zirconia ceramic.
  
  
  METHODS
  3 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.
  
  
  RESULTS
  Pre-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.
  
  
  CONCLUSIONS
  The best machinability of pre-sintered zirconia body was found for 800-900 degrees C pre-sintering temperature, and 200-300 MPa compaction pressure.
authors.affiliation: Dept. of Prosthodontics, The Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, China.
authors.forename: Huil
authors.initials: H
authors.lastname: Huang
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Fuqiang
authors.initials: F
authors.lastname: Zhang
authors.forename: Jing
authors.initials: J
authors.lastname: Sun
authors.forename: Lian
authors.initials: L
authors.lastname: Gao
mesh_terms: D002516:Ceramics; D013696:Temperature; D015019:Yttrium; D015040:Zirconium
chemical_list: D015019:Yttrium; D015040:Zirconium; C028541:zirconium oxide; C091417:yttria