TY - JOUR
T1 - Physical properties of cement composites designed for aerostatic bearings
AU - Panzera, T H
AU - Borges, P H R
AU - Rubio, J C
AU - Bowen, Christopher R
AU - Vasconcelos, W L
PY - 2009
Y1 - 2009
N2 - This paper investigates the physical properties of cement composites based on ordinary Portland cement (OPC) and silica particles as a potential material for porous aerostatic bearings for precision engineering applications. A full factorial design (2(2)4(1)) was carried out to study the effects of silica properties (size and geometry) and uniaxial pressure (10 and 30 MPa) on the composite properties, namely bulk density, apparent porosity and intrinsic permeability of the ceramic composites. Scatter graphs were plotted to identify the existence of significant correlations between parameters. The cementitious composite manufactured with small silica particles, non-spherical shape and low level of compaction pressure exhibited the most appropriate properties for the proposed application. In addition, mathematical models obtained from the response-correlation plots are potentially important tools for the development and design of new composites for porous bearing applications.
AB - This paper investigates the physical properties of cement composites based on ordinary Portland cement (OPC) and silica particles as a potential material for porous aerostatic bearings for precision engineering applications. A full factorial design (2(2)4(1)) was carried out to study the effects of silica properties (size and geometry) and uniaxial pressure (10 and 30 MPa) on the composite properties, namely bulk density, apparent porosity and intrinsic permeability of the ceramic composites. Scatter graphs were plotted to identify the existence of significant correlations between parameters. The cementitious composite manufactured with small silica particles, non-spherical shape and low level of compaction pressure exhibited the most appropriate properties for the proposed application. In addition, mathematical models obtained from the response-correlation plots are potentially important tools for the development and design of new composites for porous bearing applications.
KW - Aerostatic porous bearings
KW - Cementitious composites
KW - precision engineering
KW - Full experimental design
KW - Mechanical properties
UR - http://www.scopus.com/inward/record.url?scp=67349196759&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1617/s11527-008-9407-5
U2 - 10.1617/s11527-008-9407-5
DO - 10.1617/s11527-008-9407-5
M3 - Article
SN - 1359-5997
VL - 42
SP - 605
EP - 615
JO - Materials and Structures
JF - Materials and Structures
IS - 5
ER -