2012 - Europe Direct Iasi

6.4.
Title
Authors
Institution
EUROINVENT 2012
cell with a cathode coated steel plate with the first layer
obtained, NiZnP autocatalytic, anodes made from
platinum plates, and a saturated calomel reference
electrode, characterized in that the temperature is
30÷40°C, applied voltage 0,7÷2,0 V, cathodic current
density 70÷90 mA/cm2, anode-cathode distance 60÷80
mm, area ratio anode / cathode 5/1, pH of the electrolyte
solution 2÷2,5, ratio H3PO4/H3PO3 is 10/1, deposition time
30÷60 minutes.
Process and equipment for in-situ obtaining of aluminum
alloys matrix composite materials reinforced with carbide
particles
Vasile Soare, Dumitru Mitrica, Petru Moldovan, Mihai
Butu, Ioan Carcea
Research and Development National Institute INCDMNR-
IMNR
“Gheorghe Asachi” Technical University of Iasi
Technical University of Bucharest
Patent no. Patent application No. A 2010 00853
Description
The invention relates to a process and one equipment for
obtaining composite materials with metallic matrix by
aluminum alloys alloyed with carbide forming elements
such as silicon, titanium, ceramic particle reinforced from
silicon carbide, titanium, etc. obtained by in-situ process.
This process is conducted in argon atmosphere by blowing
gas introduced like CH4/Ar mixture, in aluminum - silicon
alloy bath, methane dissociation and synthesis reaction of
carbide formed between carbon and liquid alloy element.
Composites with matrix of aluminum - silicon alloy and
SiC particles reinforcement with small size of 5-10 μ, are
obtained by blowing 10%CH4 / 9 % gas mixture in liquid
alloy matrix containing min. 7% Si and 0.5-0.7 % Mg, at a
temperature of 900-1100 ° C, with a duration of 5-10
hours , then cooling and composite primary remelting at
670-700 ° C, keeping 5-10 min. for homogenization and
casting in molds.
Obtaining composite materials with matrix of aluminum
alloy particles reinforced by in situ process by blowing
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