An Effective Approach of Nanoscale CaF2 Addition into ZTA Composite to Enhance Tribological Characteristics in Dry Sliding

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Transactions of the Indian Ceramic Society Pub Date : 2021-01-02 DOI:10.1080/0371750X.2020.1863863

Subhrojyoti Mazumder, Kishor Kumar Sadhu, K. Ghosh, Poulomi Roy, N. Mandal

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引用次数: 5

Abstract

ABSTRACT This work was carried out to establish a noble technique to enhance tribological characteristics of zirconia toughened alumina (ZTA) ceramic composite by adding 10 wt% nano CaF2 (∼50 nm) via chemical co-precipitation method. Result of the tribological tests, carried out using ball-on-disk tribo-pair in dry sliding, showed a considerable improvement in coefficient of friction up to ∼55% and the wear rate ∼35% in CaF2/ZTA composite as compared to pure ZTA composite fabricated via chemical processing route followed by hot pressing. In the later stage, a similar CaF2/ZTA ceramic composite was fabricated by traditional physical mixing process of commercial CaF2 and ZTA powders followed by hot pressing using the same parameters and the tribological performances were compared. The specimen fabricated via chemical route possessed better responses in terms of tribo-mechanical behaviors as compared to the specimen fabricated via traditional mixing. Various phases of the composites were examined by X-ray diffraction. Elemental distribution and the worn surface were characterized by energy dispersive X-ray analysis and field emission scanning electron microscopy, respectively. GRAPHICAL ABSTRACT

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纳米级添加CaF2提高ZTA复合材料干滑动摩擦性能的有效方法

摘要:本研究通过化学共沉淀法，在氧化锆增韧氧化铝(ZTA)陶瓷复合材料中加入10 wt%纳米CaF2 (~ 50 nm)，建立了一种提高ZTA陶瓷复合材料摩擦学特性的新技术。使用球盘摩擦副进行干滑动的摩擦学测试结果表明，与通过化学加工路线然后热压制备的纯ZTA复合材料相比，CaF2/ZTA复合材料的摩擦系数提高了~ 55%，磨损率提高了~ 35%。在此基础上，采用传统的CaF2和ZTA粉末物理混合工艺，在相同的参数下进行热压，制备了类似的CaF2/ZTA陶瓷复合材料，并对其摩擦学性能进行了比较。与传统混合法制备的试样相比，化学法制备的试样具有更好的摩擦力学性能。用x射线衍射对复合材料的各相进行了表征。利用能量色散x射线分析和场发射扫描电镜对元素分布和磨损表面进行了表征。图形抽象

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.

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