Aluminum-based composite material containing titanium diboride and niobium diboride, preparation method of aluminum-based composite material and diesel engine piston

• Main Authors: YANG ZHIYONG, ZHU YIPENG, YI LYULIN, XIA ZHITAO, LIAO CONGLAI, HUANG DEWEI, WANG XI
• Format: Patent
• Language: Chinese; English
• Published: 29.07.2022
• 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 TiB2 and NbB2, which comprises the following steps: mixing titanium trialuminide and aluminum diboride, ball-milling and drying to obtain mixed powder; adding the mixed powder into an aluminum melt, reacting, removing impurities, and standing; then adding niobium powder, reacting under a stirring condition, removing impurities again, standing again, and pouring to obtain an aluminum-based composite material ingot blank containing TiB2 and NbB2; and the aluminum-based composite material ingot blank containing the TiB2 and the NbB2 is subjected to quenching and aging treatment, and the aluminum-based composite material containing the TiB2 and the NbB2 is obtained. According to the method, two compounds of TiB2 and NbB2 are generated in an in-situ self-generation and staged manner and serve as composite reinforcements of the aluminum-based composite material, so that the aluminum-based composite material has relatively