Artigo
Desenvolvimento de um dispositivo para obtenção de monocristais de ligas à base de cobre
Fecha
2003-09-01Registro en:
Quimica Nova, v. 26, n. 5, p. 757-762, 2003.
0100-4042
10.1590/S0100-40422003000500021
S0100-40422003000500021
WOS:000185471500021
2-s2.0-0141646493
2-s2.0-0141646493.pdf
Autor
Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
Resumen
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.