Aluminum-based composite material containing niobium diboride and aluminum niobide reinforced phase, preparation method of aluminum-based composite material and engine piston

• Main Authors: YANG ZHIYONG, ZHU YIPENG, YI LYULIN, XIA ZHITAO, LIAO CONGLAI, HUANG DEWEI, WANG XI
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2022
• Subjects: ALLOYS; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; COMBUSTION ENGINES; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; FERROUS OR NON-FERROUS ALLOYS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

The invention provides a preparation method of an aluminum-based composite material containing NbB2 and Al3Nb reinforced phases, which comprises the following steps: reacting excessive Al melt with B powder to obtain AlB2; nb powder and excessive aluminum melt are subjected to a reaction, and NbAl3 is obtained; the AlB2 and the excessive Al3Nb react in an aluminum melt to generate NbB2, and after refining and standing, pouring is conducted to obtain an aluminum-based ingot blank containing an NbB2 and Al3Nb reinforced phase; and the aluminum-based ingot blank is subjected to quenching and aging treatment, and the aluminum-based composite material containing the NbB2 and Al3Nb reinforced phases is obtained. The method comprises the following steps: generating two compounds of AlB2 and NbAl3 in stages; the preparation process is simple, reliable, low in cost, free of pollution and free of impurities, and the novel eutectic casting aluminum alloy material which is very practical, high in heat-conducting property