Effect of load on the tribological properties of Si3N4-based composite with N-GQDs

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

Industrial Lubrication and Tribology Pub Date : 2024-08-29 DOI:10.1108/ilt-05-2024-0161

Wei Chen, Yucheng Ma, Xingyu Liu, Enguang Xu, Wenlong Yang, Junhong Jia, Rui Lou, Chaolong Zhu, Chenjing Wu, Ziqiang Zhao

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引用次数: 0

Abstract

Purpose

The purpose of this paper is to improve the mechanical and tribological properties of Si₃N₄ ceramics and to make the application of Si₃N₄ ceramics as tribological materials more extensive.

Design/methodology/approach

Si₃N₄-based composite ceramics (SN-2L) containing nitrogen-doped graphene quantum dots (N-GQDs) were prepared by hot press sintering process through adding 2 Wt.% nanolignin as precursor to the Si₃N₄ matrix, and the dry friction and wear behaviors of Si₃N₄-based composite against TC4 disc were performed at the different loads by using pin-on-disc tester.

Findings

The friction coefficients and wear rates of SN-2L composite against TC4 were significantly lower than those of the single-phase Si₃N₄ against TC4 at the load range from 15 to 45 N. At higher load of 45 N, SN-2L/TC4 pair presented the lowest friction coefficient of 0.25, and the wear rates of the pins and discs were as low as 1.76 × 10⁻⁶ and 2.59 × 10⁻⁴mm³/N·m. The low friction and wear behavior could be attributed to the detachment of N-GQDs from the ceramic matrix to the worn surface at the load of 30 N or higher, and then an effective lubricating film containing N-GQDs, SiO₂, TiO₂ and Al₂SiO₅ formed in the worn surface. While, at the same test condition, the friction coefficient of the single-phase Si₃N₄ against TC4 was at a range from 0.45 to 0.58. The spalling and cracking morphology formed on the worn surface of single-phase Si3N4, and the wear mechanism was mainly dominated by adhesive and abrasive wear.

Originality/value

Overall, a high-performance green ceramic composite was prepared, and the composite had a good potential for application in engineering tribology fields (such as aerospace bearings).

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2024-0161/

查看原文本刊更多论文

载荷对含有 N-GQD 的 Si3N4 基复合材料摩擦学特性的影响

目的本文旨在改善 Si3N4 陶瓷的机械性能和摩擦学性能，使 Si3N4 陶瓷作为摩擦学材料的应用更加广泛。采用热压烧结工艺，在 Si3N4 基体中加入 2 Wt.% 的纳米木质素作为前驱体，制备了含有氮掺杂石墨烯量子点（N-GQDs）的 Si3N4 基复合陶瓷（SN-2L），并使用针盘测试仪对 Si3N4 基复合陶瓷与 TC4 盘在不同载荷下的干摩擦和磨损行为进行了测试。结果在 15 至 45 N 的载荷范围内，SN-2L 复合材料对 TC4 的摩擦系数和磨损率明显低于单相 Si3N4 对 TC4 的摩擦系数和磨损率；在 45 N 的较高载荷下，SN-2L/TC4 对的摩擦系数最低，为 0.25，针和盘的磨损率分别低至 1.76 × 10-6 和 2.59 × 10-4mm3/N-m。这种低摩擦和低磨损行为可能是由于在 30 N 或更大的载荷下，N-GQD 从陶瓷基体中脱离到磨损表面，然后在磨损表面形成了包含 N-GQD、SiO2、TiO2 和 Al2SiO5 的有效润滑膜。而在相同的试验条件下，单相 Si3N4 对 TC4 的摩擦系数在 0.45 至 0.58 之间。总体而言，制备出了一种高性能绿色陶瓷复合材料，该复合材料在工程摩擦学领域（如航空航天轴承）具有良好的应用潜力。同行评议本文的同行评议历史见：https://publons.com/publon/10.1108/ILT-05-2024-0161/。

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来源期刊

Industrial Lubrication and Tribology 工程技术-工程：机械

CiteScore

3.00

自引率

18.80%

发文量

129

审稿时长

1.9 months

期刊介绍： Industrial Lubrication and Tribology provides a broad coverage of the materials and techniques employed in tribology. It contains a firm technical news element which brings together and promotes best practice in the three disciplines of tribology, which comprise lubrication, wear and friction. ILT also follows the progress of research into advanced lubricants, bearings, seals, gears and related machinery parts, as well as materials selection. A double-blind peer review process involving the editor and other subject experts ensures the content''s validity and relevance.