Study on Pores Distribution Laws in Secondary Short Circuited Melted Beads of Copper Wires

Abstract

In this paper, the microstructure of the SSCMB had been watched by using scanning electron microscope (SEM2800B). Then the pores distribution characteristics of the pores inside the SSCMB were analyzed. Results based on the distribution of pore diameter, pore number per unit area and pore number inside the SSCMB were gotten. The pores diameter has the consistent trend, and it can be the support of the distinction between PSCMB and SSCMB. And Pore number of SSCMB per unit area was also consistent, and overlapping pores inside SSCMB could become the discrimination between PSCMB and SSCMB. However, pores number per bead insides the SSCMB is the same as insides the PSCMB. So this could not be look on as the SSCMB characteristics. In the paper, these results could provide the fire investigator for a reference of determining fire cause.