ZrB2-continuous C fibre composites were prepared by vacuum-bag infiltration and hot pressing, using 1D fabric carbon preforms from different commercial products. Sintering behaviour and microstructural features such as secondary phases and matrix/fibre interface were analysed. The infiltration process allowed the overall fibre content to be increased up to 70 vol.%, whilst the matrix densification was enabled by sintering aids. Due to presence of residual porosity, the degree of chemical interaction at the fibre/matrix interface was limited and this resulted in an easier pull out in the fractured surfaces, even in absence of fibre protective coating. The composites exhibited a damage tolerant behaviour. (C) 2015 Elsevier B.V. All rights reserved.
Continuous C fibre composites with a porous ZrB2 Matrix
Sciti D;Medri V;Zoli L
2015
Abstract
ZrB2-continuous C fibre composites were prepared by vacuum-bag infiltration and hot pressing, using 1D fabric carbon preforms from different commercial products. Sintering behaviour and microstructural features such as secondary phases and matrix/fibre interface were analysed. The infiltration process allowed the overall fibre content to be increased up to 70 vol.%, whilst the matrix densification was enabled by sintering aids. Due to presence of residual porosity, the degree of chemical interaction at the fibre/matrix interface was limited and this resulted in an easier pull out in the fractured surfaces, even in absence of fibre protective coating. The composites exhibited a damage tolerant behaviour. (C) 2015 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
