Figure 1
From: Superplastic Forging for Sialon-based Nanocomposite at Ultralow Temperature in the Electric Field
The punch displacement vs. sintering temperature for sailon-based ceramic in a conventional HP furnace and in an SPS apparatus respectively. There are three stages both for two sintering technologies, namely temperature raising, sintering and superplastic deformation. (a) The curve of punch displacement vs. sintering temperature for HPS, with heating rate of 40 °C/min and 20 MPa constant pressure. (b) The curve of punch displacement vs. sintering temperature for SPS, with heating rate of 300 °C/min and 20 MPa constant pressure. Obviously, the initial temperature of superplasticity in the electric field is much lower than the temperature at the time of hot pressing.
