Spark plasma sintered Al2O3-YSZ-TiO2 composites: Processing, characterization and in vivo evaluation


Ormanci O., AKIN İ., Şahin F., YUCEL O., SIMON V., CAVALU S., ...More

Materials Science and Engineering C, vol.40, pp.16-23, 2014 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 40
  • Publication Date: 2014
  • Doi Number: 10.1016/j.msec.2014.03.041
  • Journal Name: Materials Science and Engineering C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.16-23
  • Keywords: Al2O3, YSZ, TiO2, Spark plasma sintering, In vivo evaluation, FRACTURE-TOUGHNESS, ALUMINA, ZIRCONIA, BEHAVIOR, TIO2, RESISTANCE, CERAMICS
  • Istanbul Technical University Affiliated: Yes

Abstract

Al2O3 and Al2O3-YSZ composites containing 3 and 5 wt.% TiO2 were prepared by spark plasma sintering at temperatures of 1350-1400 °C for 300 s under a pressure of 40 MPa. The grain growth of alumina was suppressed by the addition of YSZ. Al 2O3-YSZ composites showed higher hardness than monolithic Al2O3. There was not a considerable difference in hardness values for Al2O3-YSZ composites containing 10 and 20 vol.% YSZ and the addition of TiO2 decreased the hardness of the composites. The fracture toughness of Al2O3 increased from 2.8 MPa·m1/2 to 4.3 MPa·m1/2 with the addition of 10 vol.% YSZ, further addition resulted in higher fracture toughness values. The fracture toughness values were increased with TiO2 addition and the highest value of fracture toughness, 5.3 MPa·m 1/2, was achieved with the addition of 20 vol.% YSZ and 5 wt.% TiO2. Preliminary in vivo tests demonstrated the biocompatibility and osseointegration of the composites after 6 week post-implantation in femur of Wistar rats. © 2014 Elsevier B.V.