Figure 6.
SEM of NBC at different HPH operation conditions: (a) 40 MPa, 15 min; (b) 40 MPa, 30 min; (c) 40 MPa, 60 min; (d) 80 MPa, 15 min; (e) 80 MPa, 30 min; (f) 80 MPa, 60 min; (g) 120 MPa, 15 min; (h) 120 MPa, 30 min; (i) 120 MPa, 60 min.
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