水热老化实验氧化铝增韧氧化锆复合材料的特性。

IF 4.6 1区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Dental Materials Pub Date : 2024-06-29 DOI:10.1016/j.dental.2024.06.023

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引用次数: 0

摘要

目的与氧化锆相比，评估不同老化方案对实验用 ATZ 复合材料的化学、物理和机械性能的影响：通过对商用粉末（Tosoh）、由 80%ZrO2/20%Al2O3 组成的 ATZ（TZ-3YS20AB）和 3Y-TZP（3Y-SBE）进行单轴压制，获得圆盘状试样。每种材料的试样按老化方案分为不同组：立即老化、高压釜老化和水热反应器老化。老化过程在 134 ºC 温度和 2.2 巴压力下进行，持续 20 小时。晶体评估采用 X 射线衍射法进行。纳米压痕测试测量了弹性模量（Em）和硬度（H）。进行了双轴抗弯强度测试，并使用 Weibull 统计法确定了特征强度和 Weibull 模量。还确定了存活概率。对 Em 和 H 数据进行了单因素方差分析和 Tukey 检验：衍射图显示两种材料在老化后都存在单斜相。与直接老化条件相比，水热反应器降低了 ATZ 的 Em 值；与直接老化条件和高压釜老化条件相比，ATZ 和 3Y-TZP 分别降低了 H 值。老化方案大大提高了 ATZ 的特性强度，而降低了 3Y-TZP 的特性强度。除在反应器中老化的 3Y-TZP 外，其他材料的威布尔模量没有差异。对于高达 500 兆帕的任务，无论老化条件如何，两种材料都有很高的存活率（>99%）：意义：与 3Y-TZP 相比，合成的 ATZ 复合材料表现出更高的物理和微观结构稳定性，这支持了实验材料在大跨度重建应用中的潜在应用。

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Characterization of a hydrothermally aged experimental alumina-toughened zirconia composite

Objectives

To assess the effects of different aging protocols on chemical, physical, and mechanical properties of an experimental ATZ composite compared to a zirconia.

Methods

Disc-shaped specimens were obtained through uniaxial pressing of commercial powders (Tosoh), ATZ comprised of 80%ZrO₂/20%Al₂O₃ (TZ-3YS20AB) and 3Y-TZP (3Y-SBE). The specimens of each material were divided into different groups according to the aging protocol: immediate, autoclave aging and hydrothermal reactor aging. The aging protocols were performed at 134 ºC for 20 h at 2.2 bar. Crystalline evaluations were performed using X-Ray Diffraction. The nanoindentation tests measured the elastic modulus (Em) and hardness (H). Biaxial flexural strength was performed, and Weibull statistics were used to determine the characteristic strength and Weibull modulus. The probability of survival was also determined. The Em and H data were analyzed by one-way ANOVA and Tukey test.

Results

Diffractograms revealed the presence of monoclinic phase in both materials after aging. The hydrothermal reactor decreased the Em for ATZ compared to its immediate condition; and the H for both ATZ and 3Y-TZP regarding their immediate and autoclave aging conditions, respectively. The aging protocols significantly increased the characteristic strength for ATZ, while decreased for 3Y-TZP. No difference regarding Weibull modulus was observed, except for 3Y-TZP aged in reactor. For missions of up to 500 MPa, both materials presented a high probability of survival (>99 %) irrespective of aging condition.

Significance

The synthesized ATZ composite exhibited greater physical and microstructural stability compared to 3Y-TZP, supporting potential application of the experimental material for long-span reconstructive applications.

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来源期刊

Dental Materials 工程技术-材料科学：生物材料

CiteScore

9.80

自引率

10.00%

发文量

290

审稿时长

67 days

期刊介绍： Dental Materials publishes original research, review articles, and short communications. Academy of Dental Materials members click here to register for free access to Dental Materials online. The principal aim of Dental Materials is to promote rapid communication of scientific information between academia, industry, and the dental practitioner. Original Manuscripts on clinical and laboratory research of basic and applied character which focus on the properties or performance of dental materials or the reaction of host tissues to materials are given priority publication. Other acceptable topics include application technology in clinical dentistry and dental laboratory technology. Comprehensive reviews and editorial commentaries on pertinent subjects will be considered.