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Summary Tema 1 - Introdución

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1. Ciencia e exeñaría dos materiais 2. Estrutura 3. Propiedades 4. Procesado 5. Tipos de materiais 6. Propiedades dos materiais 7. Selección de materiais 8. Reciclabilidade

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January 11, 2025
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2012/2013
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[TECNOLOXÍA DOS MATERIAIS] TEMA 1




TEMA 1
INTRODUCIÓN

1.1 – CIENCIA E ENXEÑARÍA DOS MATERIAIS
CIENCIA DE MATERIAIS: Coñecer e dominar aquelas propiedades dos materiais que permiten o seu
emprego en calquera industria.
ENXEÑARÍA DE MATERIAIS: Selección ou deseño dos materiais máis axeitados para unha determinada
aplicación.


1.2 – ESTRUTURA
ESTRUTURA SUBATÓMICA: Disposición dos electróns ao redor do núcleo.
• Comportamento eléctrico, magnético, térmico, óptico.
• Tipo de enlace (configuracións electrónicas).

ESTRUTURA ATÓMICA OU MOLECULAR: Disposición dos átomos no espazo.
• Disposición ordenada → Cristal.
Cristal
• Disposición desordenada → Vidros.
Vidros

ESTRUTURA MICROSCÓPICA (10-6 m): Observable a través do microscópico óptico.

ESTRUTURA MACROSCÓPICA: Gran escala.

ESTRUTURA MESOSCÓPICA: Distínguese a simple vista.


1.3 – PROPIEDADES
PROPIEDADES MECÁNICAS: Resistencia, rixidez, ductilidade, tenacidade.
PROPIEDADES ELÉCTRICAS: Constante dieléctrica, resistividade.
PROPIEDADES TÉRMICAS: Condutividade térmica, capacidade calorífica.
PROPIEDADES MAGNÉTICAS: Susceptibilidade magnética.
PROPIEDADES ÓPTICAS: Índice de refracción, reflexividade.
PROPIEDADES QUÍMICAS: Reactividade química. Degradación (corrosión).
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