Análise Espacial Espectral Bidimensional em partículas de material compósito Al\SiC
DOI:
https://doi.org/10.5540/tema.2014.015.01.0073Abstract
Este trabalho investiga o padrão da distribuição espacial de partículas de carboneto de silício em uma liga de alumínio (Al/SiC) utilizando análise espacial espectral bidimensional. Esta técnica se baseia na transformada de Fourier da função de autocovariância amostral. A análise espectral é uma ferramenta poderosa para investigar o padrão espacial de pontos, uma vez que não assume características estruturais dos dados antes da análise e utiliza-se apenas da função espectral. O material compósito foi produzido pelo Departamento de Engenharia de Materiais, da Universidade de Sheffied, Reino Unido. As coordenadas dos centros das partículas foram adquiridas através de tecnicas de processamento de imagem. O espectro polar do periodograma e métodos de Monte-Carlo são usados para testar a hipótese de completa aleatoriedade espacial das partículas. Os resultados mostram que as partículas de carboneto de silício apresentam distribuição espacial completamente aleatória na liga de alumínio e que a análise espacial espectral pode ser uma ferramenta alternativa para investigar padrões de configurações pontuais no espaço.References
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