![0022:0147: U. S. Bureau of Mines Collection - C-560-BC Furnace for Sintering Compacts ["The compacts or shapes made by pressing metallic powders have a metallic appearance, but do not have high strength. In order to increase their strength, they are 'sintered' or heated at a temperature below their melting point, in a vacuum or inert gas. This causes the separate grains from which the article was formed to weld together into a single solid mass of greater strength. The photo shows equipment for vacuum sintering of compacts form in the 2,000-ton press. This furnace is electrically heated, using silicon carbide rods."]](https://d8e7jbdw4fu0e.cloudfront.net/4452/ab0672f0-c1fc-11ee-ab27-e56e0f1cdedf-wzIJHgd.lg-nt@2x.jpg)
U. S. Bureau of Mines Collection - C-560-BC Furnace for Sintering Compacts ["The compacts or shapes made by pressing metallic powders have a metallic appearance, but do not have high strength. In order to increase their strength, they are 'sintered' or heated at a temperature below their melting point, in a vacuum or inert gas. This causes the separate grains from which the article was formed to weld together into a single solid mass of greater strength. The photo shows equipment for vacuum sintering of compacts form in the 2,000-ton press. This furnace is electrically heated, using silicon carbide rods."]