29 KB5202 KB18 KB200020242002Arnal, AlexisDupuy, Jean-LucLacaze, JacquesPoquillon, Dominiqueletnik:21številka:37 stranistr. 183-189ISSN:1580-3139COBISSID:16033753URN:URN:NBN:SI:doc-S5J1VFV9enDruštvo za stereologijo in kvantitativno analizo slike, Medicinska fakultetaImage analysis and stereologyDelec, velikostelektronska mikroskopijaImage Processing, Computer-AssistedIronkovinski prahoviMateriali, testiranjeMaterials TestingMetallurgical and Materials EngineeringMetallurgyMetalurgijaMicroscopy, Electron, ScanningMikroskopija elektronska, vrstičnaParticle SizePorosityPoroznostSlika, obdelava z računalnikomstereološka analizaŽelezoSeparation of the inter- and intra-particle porosity in images of powder compacts|Powder metallurgy is a highly developed and cheap method of manufacturing reliable materials, either metallie, ceramic or composite. This process was used to make green compacts of iron powders with a high porosity level. This study is part of a project aimed at describing the relationships between mechanical properties and morphological features of such compacts, with particular attention paid to the shape of the grains and the compaction pressure. In this report, a method is proposed to separate the intra grain porosity from the cavities located between particles. The approach is based onthe covariogram of images obtained from the surface of the compacts by meansof a laser roughometer. To achieve this separation, a model of the structure is proposed which assumes that the distributions of the grains and of the intra-particle cavities are random and independent. Each distribution is characterized by two parameters. A satisfactory agreement is obtained between experimental and calculated covariograms after identification of these parametersTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaDruštvo za stereologijo in kvantitativno analizo slike