简介:TheinfluenceofrareearthoxideCeO2onmicrostructureandwearresistanceofM80S20thermalsprayandthermalsprayweldingcoatingsisstudiedusingopticalmicroscope,scanningelectronmicroscope,X-rayenergydispersionspectroscope,X-raydiffractometerandweartestingmachine.Theresultsshowthattheaddi-tionof8%CeO2canimprovethemicrostructure,microhardnessandwearresistanceofcoatingssignificantly.
简介:ThestructureandhydridingperformanceofLa0.6Nd0.4Ni4.8Mn0.2Cux(x=0~0.4)alloyswereinvestigatedinordertodevelopsuitablematerialsformetalhydrideairconditioner.TheeffectofCuadditiononthecrystalstructure,equilibriumpressure,hydrogencapacityandhysteresisaswellashydrogenabsorption/desorptionkineticsweresystematicallystudiedbyusingthemeasurementofP-Cisotherms,X-raydiffractionandscanningelectronmicroscopy.AstheamountofCuincreases,theplateaupressureincreasesandhydrogenabsorption/desorptionkineticsisimproved,buttheeffectivehydrogenstoragecapacitydecreases.Itisshownthatvariationsinthebasalplaneparameteracanbeusedasanindicationfortheplateaupressurechanges.Withtheincreaseofparametera,theplateaupressuredecreases.ForLa0.6Nd0.4Ni4.8Mn0.2Cux(x=0~0.4)alloysthereisarelationshipbetweentheeffectivehydrogenstoragecapacitiesandtheratiosoftheirunitcellparameterscanda.Theeffectivehydrogenstoragecapacitydecreaseswithincreaseofa/c.