EBB 220/3 POLYMER COMPOSITE. What is Composites?. Combination of 2 or more materials Each of the materials must exist more than 5% Presence of interphase The properties shown by the composite materials are differed from the initial materials Can be produced by various processing techniques.
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however the distribution of loads depends on the interfacial bondings
Sometimes surface treatment is carried out to achieve the required bonding to the matrix
Characteristics of dispersed phase that might influence the properties of composites
a) Concentration (b) size (c) shape (d) distribution (e) orientation
Polymer Matrix Composites (PMC)
Metal Matrix Composites MMC)
Ceramic Matrix Composites (CMC)
- Amount/proportion (can be expressed in weight fraction (Wf) or volume fraction (Vf))of phases strongly influence the properties of composite materials.
Xc = Xf Vf + Xm (1 - Vf ) - Rule of Mixture
Xc = Properties of composites
Xf = Properties of fiber
Xm= Properties of matrix
The types of glass used are as follows: