Preparation and Properties of Sintered Copper–Tin Composites Containing Copper Coated or Uncoated Fly Ash

Autor:	A. V. Sita Rama Raju, N. Vijaya Sai, M. Komaraiah
Rok vydání:	2008
Předmět:	Materials science Mechanical Engineering Metallurgy Compaction chemistry.chemical_element Sintering Copper Industrial and Manufacturing Engineering Compressive strength chemistry Mechanics of Materials Fly ash General Materials Science Composite material Porosity Tin Mass fraction
Zdroj:	Materials and Manufacturing Processes. 23:651-657
ISSN:	1532-2475 1042-6914
DOI:	10.1080/10426910802316617
Popis:	Copper–5%tin–fly ash mixtures containing 0–16 wt% fly ash with or without copper coating were prepared. Small cylindrical specimens of 9 mm diameter and 10.5 mm length were fabricated at 300 MPa using single action die compaction at ambient temperature. These compacts were sintered in argon atmosphere for a period of 45 min at 700°, 740°, and 780°C, respectively. The green and sintered properties of the compacts were determined as a function of fly ash weight percent. The results indicated that density, hardness, and compression strength of the green compacts were improved by the electroless copper coating on fly ash reinforcement. It was also observed that coated green compacts exhibited lower spring back and higher ejection pressures compared to uncoated compacts. Sintering resulted in increase in density and decrease in volume of green compacts. Sintered density of the composites was found to decrease with increasing weight percent of fly ash. It was further observed that sintering of coated composites...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::13ded5f3c81067fd2012c04667c3dba1 https://doi.org/10.1080/10426910802316617 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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