Synthesis of Carbide-Corund Filler and its Impact on the Structure and Properties of Piston GK-AlSi12(Cu) Alloys

• Main Authors: Aleksandr I. Komarov, Valentina I. Komarova, Dmitriy V. Orda
• Format: Article
• Language: English
• Published: National Academy of Sciences of Belarus, State Scientific Institution “The Joint Institute of Mechanical Engineering" 2016-03-01
• Series: Механика машин, механизмов и материалов
• Subjects: nanosized refractory filler; ceramic nanoparticles; structure; aluminum alloy; micro-hardness; friction coefficient; wear resistance
• Online Access: http://mmmm.by/en/readers-en/archive-room-en?layout=edit&id=817
• ISSN: 1995-0470; 2518-1475

The synthesis of carbide-corundum filler based on titanium oxide by the method of chemical vapor deposition in a reducing atmosphere of ammonia and hydrogen has been investigated. The data analysis shows that the synthesized filler includes nanoscale high-melting compounds — carbide titanium and corundum. It is shown that the introduction of 1 wt.% of this nanofiller is accompanied by the dispersion of the structural components of the alloy not less than 2 times, it provides the microhardness increase of the α-phase by 1,5 times and eutectic by 2 times, the coefficient of friction decrease by 4–8 times, multiple increase of wear resistance of the composites obtained, due to the lack of wear of samples of castings for the entire test cycle of the obtained composites, whereas wear rate of the sample from GK-AlSi12(Cu) alloy at a load of 20 MPa was ~36 mg/m.