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Synthesis and Tribological Properties of Bio-Inspired Nacre-Like Composites
Ceramic materials possessing the properties of high-strength and rigidity are widely used in industry. The shell nacre has a layered structure containing both macroscopic and microscopic levels and is equipped with superior qualities regarding hardness and strength. Therefore, the ceramic composites...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163941/ https://www.ncbi.nlm.nih.gov/pubmed/30200224 http://dx.doi.org/10.3390/ma11091563 |
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author | Zhang, Hang Liu, Shuhai Xiao, Huaping Zhang, Xun |
author_facet | Zhang, Hang Liu, Shuhai Xiao, Huaping Zhang, Xun |
author_sort | Zhang, Hang |
collection | PubMed |
description | Ceramic materials possessing the properties of high-strength and rigidity are widely used in industry. The shell nacre has a layered structure containing both macroscopic and microscopic levels and is equipped with superior qualities regarding hardness and strength. Therefore, the ceramic composites with a nacre-like layered structure have the potential to be utilized as sliding bearings employed in the harsh conditions of wells. For the purpose of this paper, a porous Al(2)O(3) ceramics skeleton with nanometer powder is prepared using the freeze-casting method. Then the porous ceramic skeleton is filled with polymer polymethyl methacrylate (PMMA) through mass polymerization to produce a bionic Al(2)O(3)/PMMA composite with a lamellar structure. The properties of the prepared composite are determined by the analysis of micro-hardness, fracture toughness, friction coefficient, wear scar diameter, and the morphology of the worn surface. Consequent results indicate that elevation in the A1(2)O(3) powder, which acts as the initial solid phase content, prompts the ceramic slurry to exhibit an increase in viscosity and a gradual decrease in the pore size of the ceramic skeleton. The prepared layered Al(2)O(3)/PMMA composite possesses high fracture toughness, which closely resembles that of Al, is approximately four times that of the matrix of the Al(2)O(3) ceramics and 16 times that of the PMMA. Three kinds of composites containing different solid phase content are subjected to testing involving lubrication by water-based drilling fluid to determine the friction coefficient of each. The results indicate that an increased load leads to a decreased friction coefficient while the impact of speed is not evident. Under dry conditions, the friction coefficient of three different composites tested, declines with elevated load and speed. With the use of water-based drilling fluid as lubrication, the wear scar diameter increases at higher speed, while dry conditions denote increased load. Abrasive wear is determined to be the principal form of erosion of layered Al(2)O(3)/PMMA composites. |
format | Online Article Text |
id | pubmed-6163941 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-61639412018-10-12 Synthesis and Tribological Properties of Bio-Inspired Nacre-Like Composites Zhang, Hang Liu, Shuhai Xiao, Huaping Zhang, Xun Materials (Basel) Article Ceramic materials possessing the properties of high-strength and rigidity are widely used in industry. The shell nacre has a layered structure containing both macroscopic and microscopic levels and is equipped with superior qualities regarding hardness and strength. Therefore, the ceramic composites with a nacre-like layered structure have the potential to be utilized as sliding bearings employed in the harsh conditions of wells. For the purpose of this paper, a porous Al(2)O(3) ceramics skeleton with nanometer powder is prepared using the freeze-casting method. Then the porous ceramic skeleton is filled with polymer polymethyl methacrylate (PMMA) through mass polymerization to produce a bionic Al(2)O(3)/PMMA composite with a lamellar structure. The properties of the prepared composite are determined by the analysis of micro-hardness, fracture toughness, friction coefficient, wear scar diameter, and the morphology of the worn surface. Consequent results indicate that elevation in the A1(2)O(3) powder, which acts as the initial solid phase content, prompts the ceramic slurry to exhibit an increase in viscosity and a gradual decrease in the pore size of the ceramic skeleton. The prepared layered Al(2)O(3)/PMMA composite possesses high fracture toughness, which closely resembles that of Al, is approximately four times that of the matrix of the Al(2)O(3) ceramics and 16 times that of the PMMA. Three kinds of composites containing different solid phase content are subjected to testing involving lubrication by water-based drilling fluid to determine the friction coefficient of each. The results indicate that an increased load leads to a decreased friction coefficient while the impact of speed is not evident. Under dry conditions, the friction coefficient of three different composites tested, declines with elevated load and speed. With the use of water-based drilling fluid as lubrication, the wear scar diameter increases at higher speed, while dry conditions denote increased load. Abrasive wear is determined to be the principal form of erosion of layered Al(2)O(3)/PMMA composites. MDPI 2018-08-30 /pmc/articles/PMC6163941/ /pubmed/30200224 http://dx.doi.org/10.3390/ma11091563 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Zhang, Hang Liu, Shuhai Xiao, Huaping Zhang, Xun Synthesis and Tribological Properties of Bio-Inspired Nacre-Like Composites |
title | Synthesis and Tribological Properties of Bio-Inspired Nacre-Like Composites |
title_full | Synthesis and Tribological Properties of Bio-Inspired Nacre-Like Composites |
title_fullStr | Synthesis and Tribological Properties of Bio-Inspired Nacre-Like Composites |
title_full_unstemmed | Synthesis and Tribological Properties of Bio-Inspired Nacre-Like Composites |
title_short | Synthesis and Tribological Properties of Bio-Inspired Nacre-Like Composites |
title_sort | synthesis and tribological properties of bio-inspired nacre-like composites |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163941/ https://www.ncbi.nlm.nih.gov/pubmed/30200224 http://dx.doi.org/10.3390/ma11091563 |
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