PEEK-matrix composites containing different content of natural silica fibers or particulate lithium‑zirconium silicate glass fillers: Coefficient of friction and wear volume measurements

Q2 Materials Science
Júlio C.M. Souza , Marta S.T. Correia , Miguel Noronha Oliveira , Filipe S. Silva , Bruno Henriques , Antonio P. Novaes de Oliveira , José R. Gomes
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引用次数: 13

Abstract

The purpose of this work was to evaluate the friction and sliding wear behavior of poly-ether-ether ketone (PEEK) matrix composites containing natural amorphous silica fibers (NASF) or particulate lithium‑zirconium silicate (LZSA) glass-ceramics. PEEK and PEEK containing different weight content (10, 20, and 30 wt%) of LZSA or NASF were processed by hot pressing. Reciprocating sliding wear tests were performed on the specimens in artificial saliva solution against an alumina ball on 30 N normal force. Tests were performed at 1 Hz sliding frequency, and at 4 mm stroke length in artificial saliva solution. The worn surfaces were morphologically inspected by field emission guns scanning electron microscopy (FEGSEM) to calculate the wear volume. Coefficient of friction values recorded on PEEK or PEEK-NASF composites against alumina were lower than those on PEEK-LZSA composites. The presence of LZSA particles negatively affected the wear resistance of the PEEK composites. On sliding tests mimicking oral conditions, PEEK composites containing NASF revealed low friction and high wear resistance close to that one exhibited by PEEK. Such results can stimulate further studies on the processing and tribological characterization of PEEK composites including different percentage of natural amorphous silica fibers.

peek基复合材料含有不同含量的天然二氧化硅纤维或颗粒型硅酸锂锆玻璃填料:摩擦系数和磨损体积的测量
本工作的目的是评估含有天然非晶硅纤维(NASF)或颗粒硅酸锂锆(LZSA)玻璃陶瓷的聚醚醚酮(PEEK)基复合材料的摩擦和滑动磨损行为。采用热压法制备不同重量含量(10、20、30 wt%) LZSA或NASF的PEEK和PEEK。在人工唾液溶液中对氧化铝球施加30 N法向力进行往复滑动磨损试验。在人工唾液溶液中,以1hz滑动频率和4mm行程长度进行测试。利用场发射枪扫描电镜(FEGSEM)对磨损表面进行形貌检测,计算磨损体积。PEEK和PEEK- nasf复合材料对氧化铝的摩擦系数均低于PEEK- lzsa复合材料。LZSA颗粒的存在对PEEK复合材料的耐磨性有负面影响。在模拟口腔状况的滑动测试中,含有NASF的PEEK复合材料显示出与PEEK相近的低摩擦和高耐磨性。这些结果可以促进对含不同百分比天然非晶硅纤维的PEEK复合材料的加工和摩擦学特性的进一步研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Biotribology
Biotribology Materials Science-Surfaces, Coatings and Films
CiteScore
4.20
自引率
0.00%
发文量
17
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