添加六方氮化硼 (hBN) 对火花等离子烧结钛 (Ti) 基复合材料微观结构、机械和生物相容性能的影响

IF 3.3 2区医学 Q2 ENGINEERING, BIOMEDICAL

Journal of the Mechanical Behavior of Biomedical Materials Pub Date : 2025-04-23 DOI:10.1016/j.jmbbm.2025.107030

Satyavan Digole , Smriti Bohara , Chandrasekhar R. Kothapalli , Bharat Bajaj , Tushar Borkar

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引用次数: 0

摘要

介绍了一种利用低浓度六方氮化硼（hBN）通过球磨和放电等离子烧结（SPS）制备钛基复合材料（tmc）的新方法。球磨Ti-x wt.% hBN （x: 0.1, 0.25和0.5）粉末在60 MPa压力下烧结，温度范围为900至1200°C，保温时间为5分钟。在烧结过程中，Ti和hBN颗粒发生反应，原位形成硼化钛晶须（TiBw）和Ti(N)固溶体。添加hBN的样品的XRD谱图显示α-Ti与没有反应相的纯Ti相似，这是由于Ti中hBN的含量较低。然而，Ti- hbn样品的XRD峰移向较低的衍射角证实了Ti(N)在Ti基体内的形成。显微组织分析表明，随着hBN分数的增加，晶粒细化显著；Ti、Ti-0.1 hbn、Ti-0.25 hbn和Ti-0.5 hbn的晶粒尺寸分别为36、22、20和18 μm。TiBw和Ti(N)的存在导致了复合材料硬度和强度的提高。在1200℃下烧结的Ti-0.25 wt% hBN样品具有最佳的相对密度（99.73%）、硬度（341.8±6 HV）、屈服强度（1042±21 MPa）、抗压强度（1840±23 MPa）和伸长率（34.4±1.5%）。通过细胞粘附、细胞活力和细胞毒性研究证实了复合材料的生物相容性，突出了这些复合材料良好的生物相容性和骨科植入应用的潜力。

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Effect of hexagonal boron nitride (hBN) addition on microstructure, mechanical, and biocompatible properties of spark plasma sintered titanium (Ti) matrix composites

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Effect of hexagonal boron nitride (hBN) addition on microstructure, mechanical, and biocompatible properties of spark plasma sintered titanium (Ti) matrix composites

A novel approach is introduced, utilizing low concentrations of hexagonal boron nitride (hBN) and fabricating titanium matrix composites (TMCs) through ball milling and spark plasma sintering (SPS). The ball-milled Ti-x wt.% hBN (x: 0.1, 0.25, and 0.5) powders sintered at 60 MPa pressure and a 5-min holding time for temperatures ranging from 900 to 1200 °C. The in-situ formation of titanium boride whiskers (TiBw) and Ti(N) solid solution occurred from the Ti and hBN particle reaction during sintering. The XRD pattern of the hBN-added sample shows α-Ti similar to pure Ti without the reaction phase due to a lower hBN fraction in Ti. However, the XRD peak shift toward a lower diffraction angle for the Ti-hBN sample confirms the formation of Ti(N) within the Ti matrix. Microstructure analysis reveals significant grain refinement with increasing hBN fraction; the grain sizes for Ti, Ti-0.1hBN, Ti-0.25hBN, and Ti-0.5hBN are 36, 22, 20, and 18 μm, respectively. The presence of TiBw and Ti(N) leads to a grain refinement effect in higher hardness and enhanced strength in composite samples. The Ti-0.25 wt% hBN sample sintered at 1200 °C exhibited an optimal combination of relative density (99.73 %), hardness (341.8 ± 6 HV), yield strength (1042 ± 21 MPa), compressive strength (1840 ± 23 MPa), and elongation (34.4 ± 1.5 %). The biocompatibility is confirmed through cell adhesion, viability, and cytotoxicity studies, highlighting these composite's excellent biocompatibility and potential for orthopedic implant application.

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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.