Processing of Copper Based Foil Hardened with Zirconia by Non-Deformation Method

• Autor(a) principal: Vieira Junior,Luiz Eloi
• Data de Publicação: 2017
• Outros Autores: Bendo,Tatiana, Nieto,Maria Izabel, Klein,Aloísio Nelmo, Hotza,Dachamir, Moreno,Rodrigo, Rodrigues Neto,João Batista
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Materials research (São Carlos. Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000300835
• topic: Tape casting; Copper-zirconia; Metal-matrix composites; Particle-reinforcement; Mechanical testing

Flat sintered copper and copper-zirconia substrates, with zirconia nanoparticles contents of 1 and 3 vol%, were produced by aqueous tape casting and controlled sintering. Aqueous suspensions were prepared to a solid content of 58 vol% using 3 wt% commercial binder emulsion. The green tapes were treated at 350 ºC in air to remove organics and sintered at temperatures ranging from 800 to 1000 ºC in atmosphere of Ar/5%H2. Copper tapes reached almost full densification at 900 ºC. Composite with 1 vol% zirconia, sintered at 800 ºC, maintained high density and provided a noticeable increase of the mechanical strength, whereas further additions up to 3 vol% reduced the densification and the resulting mechanical performance became poorer.