| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9802923 | International Journal of Refractory Metals and Hard Materials | 2005 | 6 Pages |
Abstract
Vickers hardness (HV) measurements have been performed in SiC samples fabricated from various wood precursors (pine, beech, and eucalyptus): bioSiC. It was found that hardness was highly dependent on starting wood structure. The arrangement of wood cells determined the final microstructure of the bioSiC (pores distribution and SiC/Si ratio). Two well-differentiated regions could be observed in all samples; a fully dense area corresponding to the wood growth rings and another that was mostly porous (porosity volume fraction between 30% and 50%). Indents in dense regions revealed that hardness increased with decreasing SiC/Si ratio. Hardness values were compared with those of commercial reaction-bonded SiC and hot-pressed SiC. HV values in the porous region could be well described using a Ryskevitch-type equation.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
F. Gutierrez-Mora, K.C. Goretta, F.M. Varela-Feria, A.R. Arellano López, J. MartÃnez Fernández,