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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Fabrication of ZrO_2/AISI316L functionally graded materials for joint prostheses
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Fabrication of ZrO_2/AISI316L functionally graded materials for joint prostheses

机译：用于关节假体的ZrO_2 / AISI316L功能梯度材料的制备

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摘要

In this study, ZrO_2/AISI316L functionally graded materials (FGMs) were fabricated for use in joint prostheses and their mechanical and biotribological properties were evaluated through fracture toughness, bending strength, and wear resistance studies. To exploit ceramic/metal composites for joint prostheses, efficient fabrication of FGMs with stable mechanical and tribological properties is desirable. The material was designed to eliminate the defects of low fracture toughness in the case of ceramics and of degradation and toxicity in the case of metals when used in artificial joints. Spark plasma sintering was used to consolidate powders prepared by mixing ZrO_2 (3Y-PSZ) with 10-50 vol.% of AISI316L granules. The mechanical and tribological properties of the fabricated ZrO_2/AISI316L FGMs depended on the thickness of the layers from which they were composed. The fabricated FGMs showed a higher fracture toughness than a monolithic ZrO_2 when the thickness of the layers was greater than 2.0 mm. The wear resistance and bending strength response were evaluated as a function of the structure of the FGMs.
机译：在这项研究中，制造用于关节假体的ZrO_2 / AISI316L功能梯度材料（FGM），并通过断裂韧性，弯曲强度和耐磨性研究评估了它们的机械和生物摩擦学性能。为了开发用于关节假体的陶瓷/金属复合材料，期望有效地制造具有稳定的机械和摩擦学性能的FGM。该材料的设计旨在消除用于陶瓷的低断裂韧性缺陷，以及用于人工关节的金属的降解和毒性缺陷。使用火花等离子体烧结来固结通过将ZrO_2（3Y-PSZ）与10-50％（体积）的AISI316L颗粒混合而制备的粉末。制成的ZrO_2 / AISI316L FGM的机械和摩擦学性能取决于组成它们的层的厚度。当层的厚度大于2.0mm时，制成的FGM显示出比整体ZrO_2更高的断裂韧性。根据FGM的结构评估了耐磨性和弯曲强度响应。

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