Daoush Walid M, Inam Fawad, Park Hee S, Lim Byung K, Hong Soon H
Department of Chemistry, College of Science, Imam Mohammad ibn Saud Islamic University (IMSIU), Al Riyadh, Saudi Arabia.
Department of Production Technology, Faculty of Technology and Education, Helwan University, Cairo, Egypt.
J Mater Sci Mater Med. 2025 Sep 25;36(1):72. doi: 10.1007/s10856-025-06919-x.
Ceramic-Titanium matrix composites have recently attracted significant interest as a new type of biomaterials protecting the brain from external force and infections of cranial defects due to its biocompatibility and good mechanical and corrosion properties matched with the bone tissue. Spark plasma sintering (SPS) is one of powder technology techniques that can be utilised in the fabrication of final net complex and irregular shape parts used for cranial reconstruction and maxillofacial trauma by reconstruction and cranioplasty. The present work studies the effect of alumina (AlO) short fibers reinforcement addition on the nanomechanical properties estimated by the nanoindentation measurements of the Ti-12Mo-6Zr and its correlation with the microstructure. AlO short fibers/Ti-12Mo-6Zr of different AlO reinforcement short fibers content up to 5 wt.% were fabricated by Spark Plasma Sintering technique. Powders of Ti, Mo, and Zr powders were mechanically wet milled with different wt.% of AlO reinforced short fibers. The mechanically mixed AlO short fibers/Ti-12Mo-6Zr samples of different compositions were consolidated by SPS at 1000 C for 5 min under vacuum and 50 Mpa compaction pressure. Optical microscopy (OM), high-resolution scanning electronic microscopy (HRSEM) conducted with Electron dispersive spectroscopy (EDAX) unite and X-Ray Diffraction (XRD) are used to evaluate the particle size and shape, surface morphology, microstructure, the chemical compositions and the phase identifications for the investigated samples. The samples were determined by the rule of mixture (ROM) as well as the Archimedes' principle. The nanomechanical properties were estimated by measuring the nanoindentation of the produced AlO short fibers/Ti-12Mo-6Zr sintered samples using a Berkovich indenter with continuous stiffness measurement (CSM) method. The hardness and the Young modulus were estimated from the obtained data of the applied load-displacement in the depth curves. The obtained AlO short fibers/Ti-12Mo-6Zr composites have good mechanical properties which revealed the efficiency of the sintering process by spark plasma sintering. Also, the estimated hardness and Young's modulus are increased by increasing the content of the AlO reinforcement nanoparticles from 1 to 5 wt.% in the Ti-12Mo-6Zr metal matrix. Based on our findings of the nanoindentation studies; it was expected that the produced AlO short fibers/Ti-12Mo-6Zr new composites have appropriate physical and mechanical properties for cranial reconstruction applications.
陶瓷 - 钛基复合材料作为一种新型生物材料，因其生物相容性以及与骨组织相匹配的良好机械性能和耐腐蚀性能，最近在保护大脑免受外力和颅骨缺损感染方面引起了极大关注。放电等离子烧结（SPS）是粉末技术之一，可用于制造用于颅骨重建和颌面创伤修复的最终净复杂形状和不规则形状的零件，通过重建和颅骨成形术实现。本工作研究了添加氧化铝（AlO）短纤维增强体对Ti - 12Mo - 6Zr纳米力学性能的影响，该纳米力学性能通过纳米压痕测量来评估，以及其与微观结构的相关性。采用放电等离子烧结技术制备了AlO短纤维含量高达5 wt.%的不同AlO增强短纤维含量的AlO短纤维/Ti - 12Mo - 6Zr复合材料。将Ti、Mo和Zr粉末与不同重量百分比的AlO增强短纤维进行机械湿磨。将不同成分的机械混合AlO短纤维/Ti - 12Mo - 6Zr样品在真空和50 Mpa压实压力下于1000℃通过SPS固结5分钟。使用配备电子能谱（EDAX）的光学显微镜（OM）、高分辨率扫描电子显微镜（HRSEM）以及X射线衍射（XRD）来评估所研究样品的粒度和形状、表面形态、微观结构、化学成分和相鉴定。通过混合法则（ROM）以及阿基米德原理对样品进行测定。使用具有连续刚度测量（CSM）方法的Berkovich压头测量所制备的AlO短纤维/Ti - 12Mo - 6Zr烧结样品的纳米压痕，以此评估纳米力学性能。根据施加的载荷 - 位移深度曲线所获得的数据估算硬度和杨氏模量。所获得的AlO短纤维/Ti - 12Mo - 6Zr复合材料具有良好的机械性能，这表明了放电等离子烧结工艺的有效性。此外，在Ti - 12Mo - 6Zr金属基体中，随着AlO增强纳米颗粒含量从1 wt.%增加到5 wt.%，估算的硬度和杨氏模量也随之增加。基于我们纳米压痕研究的结果；预计所制备的AlO短纤维/Ti - 12Mo - 6Zr新型复合材料具有适用于颅骨重建应用的物理和机械性能。
