Microstructures after Bending Deformations to Fracture of Zr Ion Irradiated Superplastic Ceramic 3Y-TZP

Abstract:

The effects of Zr ion irradiation on the mechanical properties of a typical superplastic ceramic, 3mol% yttria stabilized tetragonal zirconia polycrystal (3Y-TZP), were examined and discussed. The specimens were irradiated by Zr11+ ions with 130MeV at fluence level of 3.5×1012 and 2.1×1013 ions/cm2 in the TANDEM accelerator at Tokai Reasearch Establishment of JAEA. Microstructures after annealing and bending deformations to fracture of Zr ion irradiated 3Y-TZP were examined. It was found that the ratio of intergranular fracture to intragranular fracture was increased in the region that was affected by Zr ion irradiation. It seemed that grain boundary cohesion became relatively weak in the irradiated surface region. The influence of Zr ion irradiation on the mechanical properties almost disappeared when the irradiated 3Y-TZP was subsequently heated to 1173K.

• Periodical: Materials Science Forum (Volumes 551-552)
• Pages: 475-480
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.551-552.475
• Online since: July 2007
• Authors: Takaaki Sakuma, Yoshinobu Motohashi, Taiju Shibata, Kazuhiro Sawa, Masahiro Ishihara
• Keywords: 3Y-TZP, Annealing, Ion Beam Surface Modification, Microstructure, Residual Stress, Superplasticity

References

[1] For example, Y. Motohashi, Shinsozai, Vol. 4 (1993), p.33 (in Japanease).

[2] Shibata et al., Nucl. Instr. and Meth., B206 (2003), pp.139-143.

[3] Y. Motohashi et al., Nucl. Instr. and Meth., B206, (2003), pp.144-147.

[4] Y. Motohashi, et al., Trans. Mater. and Heat Treatment, Vols. 25, No. 5 (2004), pp.1032-1036.