Table 2.

Young's modulus E, Poisson's ratio µ, relations G/B of the PcBN samples.

Composite	cBN-TiN			cBN-TiCN			cBN-NbN
	E [GPa]	η	G/B	E [GPa]	η	G/B	E [GPa]	η	G/B
Pure	546 ± 20	0.20 ± 0.01	0.50	675 ± 25	0.19 ± 0.01	0.51	585 ± 20	–	0.50
Reinforced Al2O3w	675 ± 25	0.18 ± 0.01	0.55	613 ± 20	0.17 ± 0.01	0.56	610 ± 20	–	0.55
Reinforced SiCw	755 ± 25	0.18 ± 0.01	0.55	650 ± 25	–	0.55	536 ± 20	0.20 ± 0.01	0.50