Microstructural design of materials for aerostatic bearings

被引：27

作者：

Panzera, T. H. ^{[1
]}

Rubio, J. C. ^{[1
]}

Bowen, C. R. ^{[2
]}

Walker, P. J. ^{[3
]}

机构：

[1] Univ Fed Minas Gerais, Dept Mech Engn, BR-31270901 Belo Horizonte, MG, Brazil

[2] Univ Bath, Dept Mech Engn, Mat Res Ctr, Bath BA2 7AY, Avon, England

[3] Univ Bath, Dept Civil & Architectural Engn, Bath BA2 7AY, Avon, England

来源：

CEMENT & CONCRETE COMPOSITES | 2008年 / 30卷 / 07期

关键词：

porous bearing; cementitious composite; full factorial design;

D O I：

10.1016/j.cemconcomp.2007.08.013

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The aim of this work is to investigate the development of a high strength porous cementitious composite manufactured via cold-pressed compaction for use as the restrictor in aerostatic bearings for high precision applications since they provide a number of advantages over conventional orifice restrictors. The selection of suitable materials and microstructural design of composites phases is essential to the development of material for optimum stiffness, strength, porosity and permeability. A variety of high purity (99.98% SiO2) silica particle types was mixed with ordinary Portland cement to produce the composite mixtures. A full factorial design (2 2 41) was carried out to study the effects of silica properties (size and geometry) and uniaxial pressures (10 MPa and 30 MPa) on mechanical properties and microstructure of the ceramic composites. The cementitious composite manufactured using small silica particles, non-spherical shape and low level of compaction pressure exhibited the most appropriate properties for the stated application of porous bearings. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：649 / 660

页数：12

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