Aluminium

About: Aluminium is a research topic. Over the lifetime, 46934 publications have been published within this topic receiving 556441 citations. The topic is also known as: Al & element 13.

Mechanical behavior of Al–Cu binary alloy system/ Cu particulates reinforced metal-metal composites

Abstract: Aluminium composite metallic materials are prepared by stir-cast technique, reinforcing 5 ​wt% copper powder (50 ​μm size) in Al–5wt% Cu alloy. SEM structures shows Cu particles not alloyed with the matrix material. EDAX studies inveterate the existence of elements in both binary alloys and the composite. Optical microstructures show uniform distribution of Cu particles in the Al–Cu alloy matrix. Richer alloy show 13% greater hardness compared to lean alloy. Enhanced precipitation of CuAl2 population around copper particulates observed. Cast fingers of Al-5wt% and Al-10 ​wt% Cu alloys and composite are homogenized at 100 ​°C for 24 ​h, resulted in more uniform distribution of the CuAl2 population. Standard samples of 3 ​mm thick discs solutionized at 450 ​°C for 2 ​h are aged at 190 ​°C to determine T6 condition. The peripheral increase in hardness is observed due to the increased Cu content because of solid-solution strengthening only. Alloy with 10 ​wt% Cu content show a decrease in tensile strength compared to 5 ​wt% alloy. This is due to the increased phase in interdendritic region of α-phase solid solution. Tensile property of 5 ​wt% Cu alloy is higher compared to 10 ​wt% alloy and composite, after ageing.

High strength heat-resisting hypereutectic aluminium-silicon alloy and preparation method thereof

Abstract: The invention relates to a high strength heat-resisting hypereutectic aluminium-silicon alloy, belonging to the field of metallurgical technology The hypereutectic aluminium-silicon alloy comprises the components according to the weight percentage: 170-190% of silicon, 10-20% of copper, 03-07% of magnesium, 05-10% of nickel, 05-10% of ferrum, 03-07% of manganese, 0-04% of zirconium, 0-028% of cerium, 0-012% of lanthanum, 0-002% of praseodymium, 0-008% of niobium, 05-10% of chromium, 03-07% of molybdenum, 007-015% of phosphorus, less than 05% of impurities and rest of aluminum A method for preparing the high strength heat-resisting hypereutectic aluminium-silicon alloy comprises: the aluminium is heated to be melted, and then added with other metals to be melted; the melted mixture is added with alterative and refining agent for refining or blown with argon for refining; then, the obtained product is processed by pouring and heat treatment The method has simple technique and low cost; the hypereutectic aluminium-silicon alloy prepared by the method has higher temperature mechanical property compared with the existing hypereutectic aluminium-silicon piston alloy with other trademarks at home and abroad

Room-temperature formation of thermally stable aluminium-rich mesoporous MCM-41

Abstract: The room-temperature (RT) synthesis of MCM-41 mesoporous compounds with high substitution levels of aluminium (Si / Al = 1.5) is achieved in a minimum time of synthesis. The compound shows similar characteristics to hydrothermally synthesized materials. 27Al NMR study confirms the presence of tetrahedral aluminium in as-synthesized material as well as in the calcined material without observing the presence of octahedral aluminium after calcination.