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  4. 18. The Department of Rheological and Physical-Chemical Foundations of Powder Materials Technology
  5. Mikhailov O.
  6. Article

Effect of Hot Pressing on the Mechanical Properties and Structure of Green Compacts of Heterogeneous Copper-Based Powder

T.Epifanceva,
 
V.G.Kayuk,
 
M.Shtern,
 
I.Martyukhin,
 
A.Koval,
 
O.Mikhailov
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2010, #01/02
http://www.materials.kiev.ua/article/1517

Abstract

The paper examines the hot pressing of copper-based powder mixtures with additions of lead, graphite, and tungsten. It is shown that the density of compacts increases by 2 to 3% in hot pressing of copper-based powders with additions of lead and graphite at 800 MPa and their bending strength and elastic modulus become almost twice as high. The tungsten content of 20 and 50% of the compact increases the bending strength. Preliminary cold pressing of samples before hot pressing has practically no effect on material properties and, hence, does not contribute to energy saving.


BENDING STRENGTH, COPPER POWDERS, ELASTIC MODULI, GRAPHITE POWDERS, LEAD POWDERS, MICROSTRUCTURE, POROSITY, PRESSING FORCE, PRESSING PATTERN, TEMPERATURE, TUNGSTEN POWDERS, WARM PRESSING

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