Electrochemical and metallurgical industry . rance of this alloy to theunaided eye was very striking, presenting irregular polyhedralgrains, sometimes 2 or 3 millimeters across. Fig- 33 shows the per cent alloy, also 34 white areas show the presence of silicon, as they are com- The Action of Silicon TowAkDs Carbon anu SiliconCarhiue. The facts recorded in this division of the subject arc pre-sented, because of the peculiar micrOstructures and physicalproperties observed. Silicon may be melted in a carbon container without intro-ducing carbon or silicon carbide. Fig. 37 show
Electrochemical and metallurgical industry . rance of this alloy to theunaided eye was very striking, presenting irregular polyhedralgrains, sometimes 2 or 3 millimeters across. Fig- 33 shows the per cent alloy, also 34 white areas show the presence of silicon, as they are com- The Action of Silicon TowAkDs Carbon anu SiliconCarhiue. The facts recorded in this division of the subject arc pre-sented, because of the peculiar micrOstructures and physicalproperties observed. Silicon may be melted in a carbon container without intro-ducing carbon or silicon carbide. Fig. 37 shows the junctionformed between silicon and Achcson graphite under a mag-nification of 34 diameters. The dividing line is sharply defined,and the silicon is homogeneous in structure, sluiwing no areasin relief, which are always seen when silicon carbide is present. Fig. 38 shows a cross-section of the tip of an arc electrodeused in fusing silicon. In this case the silicon was subjectedto a very high temperature, and the carbon to the action of.
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