Table 6.

Damping factor of the composite.

Sample Name	Damping Factor
	Mode 1	Mode 2	Mode 3
K	0.1841	0.0266	0.0206
B	0.0781	0.0113	0.0088
BK	0.0791	0.0410	0.0191
3B7K	0.2853	0.1360	0.0675
7B3K	0.0928	0.0471	0.0222