石墨烯纳米板和二硼化锆对火花等离子烧结方形碳化硼复合材料的复合效应

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-08-25 DOI:10.1016/j.jeurceramsoc.2025.117773

Behrad Mokhtari, Leyla Yanmaz, Demet Aydogmus, Berkay Uygun, Filiz Cinar Sahin

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引用次数: 0

摘要

在本研究中，将不同量（1、2和3 vol%）的石墨烯纳米片（GNPs）掺入含有5和15 vol% ZrB2的B4C复合粉末中。采用火花等离子烧结（SPS）技术，在1540℃、50 MPa、7 min的保温条件下制备了方形复合材料。研究了GNP对复合材料致密化行为、均匀性、力学性能和显微组织的影响。结果表明：在B4C-ZrB2基体中加入GNPs可提高方形复合材料的相对密度，改善其在不同截面（中心、边缘、角落）的均匀性；含有15 vol% ZrB2和1 vol% GNP的复合材料表现出最佳性能，相对密度、硬度和断裂韧性分别为~ 99.5 %、34.76 GPa和4.15 MPa。分别m1/2。此外，裂纹挠曲、分支和桥接被确定为主要的增韧机制。

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Combined effects of graphene nanoplatelet and zirconium diboride additions on spark plasma sintered boron carbide composites with square geometry

In the present work, graphene nanoplatelets (GNPs) in varying amounts (1, 2, and 3 vol%) were incorporated into B₄C composite powders containing 5 and 15 vol% ZrB₂. The square-shaped composites were produced by spark plasma sintering (SPS) at 1540°C under 50 MPa with a 7 min holding time. The effects of GNP addition on the densification behavior, homogeneity, mechanical properties, and microstructure of the composites were evaluated. The results showed that adding GNPs into the B₄C-ZrB₂ matrix enhanced the relative density and improved the homogeneity across different sections (center, edge, corner) of the square-shaped composites. Composites containing 15 vol% ZrB₂ and 1 vol% GNP demonstrated optimal performance with relative density, hardness, and fracture toughness of ∼99.5 %, 34.76 GPa, and 4.15 MPa.m^1/2, respectively. Moreover, crack deflection, branching, and bridging were identified as primary toughening mechanisms.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.