Preparation of High‐Strength Calcium Phosphate Ceramics with Low Modulus of Elasticity Containing β‐Ca(PO ₃ ) ₂ Fibers

Abstract

Novel calcium phosphate ceramics were fabricated by hot‐pressing fibrous products extracted from crystallized products of calcium ultraphosphate glasses by aqueous leaching. The ceramics were dense materials with a relative density of >95%; these ceramics were composite materials that consisted of β‐Ca(PO 3 ) 2 fibrous crystals with CaO–P 2 O 5 glass, which was formed during hot pressing, as the matrix phase. These ceramics showed a high bending strength of 150–220 MPa and a low Young's modulus of 30–60 GPa. The high toughness contributed to the high strength, with fiber pull‐out and crack deflection observed as the primary toughening mechanism.