1. Federal University of Piauí, Graduate Program in Materials Science; Teresina Piauí Brazil
2. Department of Mecanical Engineering-Teresina; Federal University of Piauí; Piauí Brazil
3. Center Science and Technology, Graduate Program in Materials Science and Engineering; Federal University of Campina Grande; Campina Grande PB Brazil
4. Graduate Program in Materials Science and Department of Materials Engineering; Federal University of Piauí; Av. Ininga, S/N - Ininga Teresina Piauí Brazil