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Figure 1

From: Sintering boron carbide ceramics without grain growth by plastic deformation as the dominant densification mechanism

Figure 1

The effects of pressure and temperature on the densification of B4C powders.

(a) The relative density as a function of pressure at 1,700 °C soaking for 5 min. (b) The sintering curves with different pressures at 1,700 °C. (c) The sintering curves with different temperatures under 80 MPa. (d–g) The fracture surfaces of sintered B4C with different pressures at 1,700 °C soaking for 5 min. (d) 30 MPa. (e) 50 MPa. (f) 80 MPa. (g) 100 MPa. (h,i) The detailed morphology characterization of a fully dense B4C fabricated under 1,700 °C, 80 MPa soaking for 5 min. (h) TEM bright field image with SAED patterns. (i) HRTEM image of the grain boundary with indexing of the lattice fringes along the two adjacent grains.

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