5399440 Composite material with a glass-ceramic or ceramic matrix obtained by the sol-gel process and reinforced by fibers based on silicon carbide, its manufacture and its applications

1996 ◽  
Vol 27 (1) ◽  
pp. 87
Author(s):  
M. Uthayakumar ◽  
Balamurugan Karnan ◽  
Adam Slota ◽  
Jerzy Zajac ◽  
J. Paulo Davim

This chapter presents an effective approach to assess the abrasive water jet machining of lanthanum phosphate reinforced with yttrium composite. A novel composite is prepared with the mixture of lanthanum phosphate sol and yttrium nitrate hexalate with a ratio of 80/20 by aqueous sol-gel process. Silicon carbide of 80 mesh size is used as abrasive. The effects of each input parameter of abrasive water jet machining are studied with an objective to improve the material removal rate with reduced kerf angle and surface roughness. The observations show that the jet pressure contributes by 77.6% and 45.15% in determining material removal rate and kerf angle, respectively. Through analysis of variance, an equal contribution of jet pressure (38.18%) and traverse speed (40.97%) on surface roughness is recorded. Microscopic examination shows the internal stress developed by silicon carbide which tends to get plastic deformation over the cut surface.


2007 ◽  
Vol 330-332 ◽  
pp. 169-172 ◽  
Author(s):  
Ming Xue ◽  
Jun Ou ◽  
Da Li Zhou ◽  
Dange Feng ◽  
Wei Zhong Yang ◽  
...  

The porous apatite-wollastonite bioactive glass-ceramic (AW-GG) was made from nano-precursor powders derived from sol-gel process, and shaped by dipping method with polymer foam. The physical-chemical properties, bioactivity and biocompatibility of the materials were studied by means of TG, XRD, SEM, TEM and so on. The bioactivity was investigated in simulated body fluid (SBF) and the biocompatibility was evaluated by co-culturing with marrow stromal cells (MSCs). The result shows that: the particle size of the AW precursor powders is 40~100nm; porous AW GC has three-dimensional pored structure with 300~500um macropores and 2~5um micropores; the materials possess high bioactivity and biocompatibility. Porous AW GC may therefore have great potential application as bone tissue engineering scaffold.


2009 ◽  
Vol 63 (28) ◽  
pp. 2449-2451 ◽  
Author(s):  
S.B. Mishra ◽  
A.K. Mishra ◽  
R.W. Krause ◽  
B.B. Mamba

2019 ◽  
Vol 103 (5-8) ◽  
pp. 3175-3186 ◽  
Author(s):  
Yadong Gong ◽  
Shuoshuo Qu ◽  
Yuying Yang ◽  
Chunyou Liang ◽  
Pengfei Li ◽  
...  

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