. Alloys of tungsten by diffusion. Fig. Experiment 1 Furnace No. 2 Time 1 hour Temperature .... 900° C. Etched HF Photomicrograph . x 100 Fig. XIII. shov/s theform of a white tungsten al-loy at the junction of themetals. This alloy has heendiffused into the tin andalso to a slight extent intothe tungsten. The depth ofdiffusion into the tin wasabout one-eighth of an inch. Fig. XIV. shows thestructure of the tin beyondthe depth of the formationof the alloy, after veryslight etching. Fig. XIV. 21 g. Tungsten and carbon. Jeffries1 states that tungsten, at high temperatures,in the presence o
. Alloys of tungsten by diffusion. Fig. Experiment 1 Furnace No. 2 Time 1 hour Temperature .... 900° C. Etched HF Photomicrograph . x 100 Fig. XIII. shov/s theform of a white tungsten al-loy at the junction of themetals. This alloy has heendiffused into the tin andalso to a slight extent intothe tungsten. The depth ofdiffusion into the tin wasabout one-eighth of an inch. Fig. XIV. shows thestructure of the tin beyondthe depth of the formationof the alloy, after veryslight etching. Fig. XIV. 21 g. Tungsten and carbon. Jeffries1 states that tungsten, at high temperatures,in the presence of carbonaceous gases, forms tungsten carbide,generally Ct and, at higher temperatures, in the presence ofsolid carbon,. He shows micrcphotographs of tungsten carbonizedin the presence of hydrocarbons at 1100° Cf, and in the presenceof solid carbon at 1800° C. Moissan^ has formed the carbide W2C by the reduction ofWO3 with an excess of carbon in an arc of 900 amperes at 50 is not, however, of much importance here, since the pro
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