Desenvolvimento de um dispositivo para obtenção de monocristais de ligas à base de cobre

• Autor(a) principal: Blanco, Matildes [UNESP]
• Data de Publicação: 2003
• Outros Autores: Barelli, Nilso [UNESP], Vicente Benedetti, Assis [UNESP], Andrade Flor, Samuel Waldemar
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0100-40422003000500021; http://hdl.handle.net/11449/67398
• topic: Copper-based alloys; Modified Bridgman technique; Single crystal; alloy; aluminum derivative; copper complex; silver derivative; zinc derivative; cost benefit analysis; crystal structure; device; extraction; high temperature; melting point; quality control; technique; temperature dependence; thermostability; X ray crystallography

This paper describes the drawing, construction and optimization of a device, which can be used to obtain single crystals of different metallic materials with melting point from 550 to 1050°C. Components of ease obtaining and of low cost were used. The device was based on the modified Bridgman technique and it was used to obtain single crystals of copper-based alloys. The temperature axial profiles and a difference less then 1% in the temperature between the wall and the center of the ceramic tube in the critical region for obtaining single crystals of good quality indicated that the oven presents a good thermal stability. Single crystals of CuZnAl and CuAlAg alloys of good quality were growth and characterized using optical microscopy and Laüe X-ray back reflection.