Effect of Strain Rate on Tensile Deformation of Hydroxyapatite Ceramic Material with B₂O₃ Addition

Abstract

The superplasticity deformation of hydroxyapatite (Ca₁₀(PO₄)₆OH₂;HAp) with B₂O₃ addition has been investigated in this research. The pulse current pressure sintering of HAp compact with B₂O₃ addition was conducted at 1000ºC for 10 min. Relative densities of the HAp ceramic materials with B₂O₃ addition were kept being 99%, regardless of the difference in amount of B₂O₃ of 1-10 mol%. The tensile strains of the sintered HAp specimen with 3 mol% B₂O₃ addition were as high as 580% at the strain rates of 1.5×10^-4-2.4×10^-3 s^-1.