Dilatometric and microstructural study of particle and functionally graded composites based on hydroxyapatite and crystalline bioglass

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS Science of Sintering Pub Date : 2023-01-01 DOI:10.2298/sos221028017d

D. Drdlík, K. Drdlíková, K. Maca

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引用次数: 1

Abstract

Hydroxyapatite (HA) and bioglass (BG) ceramics have become of prime importance in bone tissue engineering. Besides the appropriate composition, the microstructure of bone replacement plays a crucial role. In the present work, particle composites and functionally graded material (FGM) based on HA and BG prepared by electrophoretic deposition were thoroughly characterised in terms of the preparation method, sintering process, phase composition and microstructure. The sintering was monitored by high-temperature dilatometry in two directions, the sintering rates were calculated, and the overall sintering process was discussed. The SEM showed the continuous change in the microstructure of FGM with gradual interconnected porosity favourable for bio-applications. The fundamental fractographic analysis proved the crack development in FGM related to the sintering process, and the recommendations for the reduction of the crack development were given. The phase transformations during thermal treatment were analysed using X-ray diffraction analysis and deeply discussed.

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羟基磷灰石与结晶生物玻璃的粒子与功能梯度复合材料的膨胀学与微观结构研究

羟基磷灰石(HA)和生物玻璃(BG)陶瓷已成为骨组织工程中的重要材料。除了适当的成分外，骨替代物的微观结构也起着至关重要的作用。本文从制备方法、烧结工艺、相组成和微观结构等方面对电泳沉积法制备的HA和BG颗粒复合材料和功能梯度材料(FGM)进行了全面的表征。采用高温膨胀法对烧结过程进行了两个方向的监测，计算了烧结速率，并对整个烧结过程进行了讨论。扫描电镜显示了FGM的微观结构的连续变化，逐渐相互连接的孔隙有利于生物应用。基本断口分析证明了烧结过程中裂纹的发展与烧结过程有关，并提出了减少裂纹发展的建议。采用x射线衍射分析方法对热处理过程中的相变进行了分析，并进行了深入讨论。

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.