Fracture toughness and subcritical crack growth analysis of high-translucent zirconia prepared by stereolithography-based additive manufacturing

IF 3.3 2区医学 Q2 ENGINEERING, BIOMEDICAL Journal of the Mechanical Behavior of Biomedical Materials Pub Date : 2025-01-24 DOI:10.1016/j.jmbbm.2025.106917

Li Wang , Kang Wang , Zongdong Hao , Rui Dou , Fangyong Zhu , Yufeng Gao

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Abstract

The objective was to study the subcritical crack growth phenomena and determine the fracture toughness of two yttria-partially-stabilized zirconia ceramics. One of the two materials evaluated was a commercially available 5 mol% yttria partially stabilized zirconia (5Y-PSZ), and the other was an experimental partially stabilized zirconia made from a mixture of 3 mol% and 8 mol% yttria stabilized zirconia powder (3Y+8Y-PSZ), with the final samples prepared by the Stereolithography (SLA) process. The samples in water were tested by three-point bending experiments at different stress rates to obtain Weibull and SCG parameters. The results show that 3Y+8Y-PSZ has higher Weibull modulus(m = 11.54) and characteristic strength(σ₀ = 812.27 MPa) compared to 5Y-PSZ (m = 8.57, σ₀ = 647.25 MPa). SCG parameters n obtained for 5Y-PSZ and 3Y+8Y-PSZ tested in water were 26.03, 37.94, respectively. The strength of 5Y-PSZ and 3Y+8Y-PSZ (P_f = 5%) was reduced by 56.49%, 45.30% after 10 years of simulated use. Regarding the fracture toughness of both materials, 3Y+8Y-PSZ had higher values regardless of the method used to determine it. However, the fitting correction factor of the Vickers indentation method was not applicable to either 5Y-PSZ or 3Y+8Y-PSZ. Determining the SCG parameters of two materials and predicting their lifetimes using constant stress rate testing is an effective way to evaluate materials.

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来源期刊

Journal of the Mechanical Behavior of Biomedical Materials 工程技术-材料科学：生物材料

CiteScore

7.20

自引率

7.70%

发文量

505

审稿时长

46 days

期刊介绍： The Journal of the Mechanical Behavior of Biomedical Materials is concerned with the mechanical deformation, damage and failure under applied forces, of biological material (at the tissue, cellular and molecular levels) and of biomaterials, i.e. those materials which are designed to mimic or replace biological materials. The primary focus of the journal is the synthesis of materials science, biology, and medical and dental science. Reports of fundamental scientific investigations are welcome, as are articles concerned with the practical application of materials in medical devices. Both experimental and theoretical work is of interest; theoretical papers will normally include comparison of predictions with experimental data, though we recognize that this may not always be appropriate. The journal also publishes technical notes concerned with emerging experimental or theoretical techniques, letters to the editor and, by invitation, review articles and papers describing existing techniques for the benefit of an interdisciplinary readership.

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