1 results about "Binary alloy" patented technology

The invention discloses a vacuum pump and a preparation method, belonging to the technical field of metal materials. The vacuum pump is made from the following raw materials by weight percent: 0.2-0.4% of Rh, 0.2-0.4% of Ru, 0.5-1.5% of Cu, 0.5-1.5% of Ni, 0.4-0.6% of Ba, 1-3% of Mn, and the balance of Al and impurities. In the raw materials, manganese can greatly reduce the content of impurity element sulphur in alloy and refine grains, and barium can quickly form a barium oxide with impurity oxygen in the alloy. Ruthenium and rhodium can form a ruthenium-rhodium binary alloy system in the alloy, so that the strength and the hardness of the alloy are increased by fold. Meanwhile, in combination with pouring of cupronickel on the surface of the alloy, a multi-element alloy phase is formedon the surface of the alloy, and therefore, the mechanical performance, processing performance and corrosion resistance of the aluminum alloy are greatly improved.