Spark plasma sintering of hard wear-resistant graphene nanoplatelet–reinforced TiB2 + SiC composites from TiC–B4C–SiC

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-08-19 DOI:10.1111/jace.20094

Jesús López-Arenal, Victor Zamora, Fernando Guiberteau, Angel L. Ortiz

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引用次数: 0

Abstract

Graphene nanoplatelet (GNP)–reinforced TiB₂ + SiC composites were fabricated by reactive spark plasma sintering (SPS) from a TiC–B₄C–SiC powder mixture with equal-volume percentages, optimizing their SPS temperature and evaluating their unlubricated sliding wear against diamond. First, it is shown that during the heating ramp of the SPS cycle, TiC and B₄C react according to the chemical reaction 2TiC + B₄C → 2TiB₂ + 3C, and that the thus-formed C is graphenized as GNPs, leading to composites with microstructures consisting of a ceramic matrix of fine TiB₂ and SiC grains with abundant randomly oriented GNPs at grain boundaries. It is also shown that this reactive SPS is optimal at 2000°C (under 75 MPa pressure and 5 min soaking), resulting in a very hard (∼28.5–29.9 GPa) and very tough (∼6.7(3) MPa m^1/2) composite. And second, it is shown that these two properties and its proneness to develop an oxide tribolayer make this composite very resistant to unlubricated sliding wear against diamond (∼2.8(1)·10⁸ (N m)/mm³), undergoing only very mild two-body abrasion. Finally, opportunities for the fabrication of toughened and very hard ceramic composites for contact-mechanical and tribological applications are discussed.

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从 TiC-B4C-SiC 到石墨烯纳米板强化 TiB2 + SiC 复合材料的火花等离子烧结硬质耐磨材料

通过反应火花等离子烧结（SPS）技术，以等体积百分比的 TiC-B4C-SiC 混合粉末为原料，制备了石墨烯纳米板（GNP）增强 TiB2 + SiC 复合材料，优化了其 SPS 温度，并评估了其与金刚石的无润滑滑动磨损。首先，研究表明，在 SPS 循环的加热斜坡期间，TiC 和 B4C 根据化学反应 2TiC + B4C → 2TiB2 + 3C 发生反应，由此形成的 C 被石墨化为 GNPs，从而产生复合材料，其微观结构由细小的 TiB2 和 SiC 晶粒组成的陶瓷基体和晶界处大量随机取向的 GNPs 组成。研究还表明，这种反应性 SPS 在 2000°C（75 兆帕压力和 5 分钟浸泡）条件下达到最佳状态，从而产生了硬度极高（∼28.5-29.9 GPa）、韧性极强（∼6.7(3) 兆帕 m1/2）的复合材料。其次，研究表明，这两种特性及其形成氧化摩擦层的可能性使这种复合材料对金刚石（2.8(1)-108 (N m)/mm3）的无润滑滑动磨损具有很强的抵抗力，只承受非常轻微的双体磨损。最后，还讨论了为接触机械和摩擦学应用制造增韧和高硬度陶瓷复合材料的机会。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.