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Grazielle de Oliveira Setti, Jorge Vicente Lopes da Silva, Marcelo Fernandes de Oliveira, Izaque Alves Maia, Dosil Pereira de Jesus, Raluca Savu, Thebano Emilio de Almeida Santos, Rita de Cássia Zacardi de Souza and Ednan Joanni
The purpose of this paper is to characterize polyamide parts prepared by the SLS process using techniques that are dependent on surface properties and compare the results…
The purpose of this paper is to characterize polyamide parts prepared by the SLS process using techniques that are dependent on surface properties and compare the results to density measurements in order to assess which technique better reflects the degree of densification achieved using different laser power levels.
Fabrication of Nylon 12 (Duraform PA) samples and their characterization by apparent density measurements, perfilometry, Raman spectroscopy, scanning electron microscopy, specific surface area and contact angle measurements.
Methods dependent on surface analysis are not suitable indicators of the degree of sample densification. Among the surface methods, the results from Raman spectroscopy are the ones with the best performance. Incipient sintering of the superficial layers and raw material powder on the surface, inherent to the parts made by the SLS process, strongly interfere with the characterization.
Quantitative comparison of a number of surface probing methods for monitoring densification of SLS parts. Characterization of sample surfaces with and without raw material powder.
The chapter begins by examining the origins of sociology of sport in Spain, which dates back to the transition to democracy, during which period sport became transformed…
The chapter begins by examining the origins of sociology of sport in Spain, which dates back to the transition to democracy, during which period sport became transformed progressively from an object of social concern into an object of sociological study. It then goes on to analyse the main factors of activation in particular processes of university teaching staff accreditation which acted as catalysts for the set of processes that fostered the emergence of sociology of sport in Spain. Lastly, the principal study fields are analysed by grouping them into three areas: sport and society, social attitudes to sport and sport facilities and organisations. In the conclusion, an assessment is made of contributions made to the speciality as well as of sociology of sport’s progressive internationalisation, a rare phenomenon prior to 2005 which is now regarded as a major indicator of the maturity of the discipline.