Pressureless sintered powder
Overviewofpressurelesssinteringfinepowder:Pressurelesssinteringisaconventionalsinteringmethod,Amethodofsinteringbyheatingtheproduct,whichismostcommonlyused,Itisalsothesimplestsinteringmethod.SiliconcarbidepressurelesssinteringiswidelyusedTheWseriesultra-finesiliconcarbidepowderproducedbythecompanyismainlyusedinsealandbulletproofequipmentmanufacturersduetoitshighpurity,narrowparticlesizedistribution,goodfluidityandstrongstability.Highperformancespecialceramicmaterialswithhighstrength,highhardness,hightemperatureresistance,corrosionresistance,wearresistanceandthermalshockresistancearewidelyusedinaerospace,powerelectronics,mechanicalindustry,petrochemicalindustry,ship,pumpvalve,newenergy,scientificresearch,nationaldefenseandmilitaryfields.Maintechnicalspecifications:NameproductSpecificationandgranularityAppearancecolorPurity(%)Iron(%)carbon%PressurelesssinteringofmicropowderW14#.W10#.W7#.W5#.W3.5#.W2.0#.W1.0#W0.5#Puregreen≥99≤0.02≤0.01OtherspecificationscanbecustomizedaccordingtouserrequirementsIntroductionanddevelopmentofpressurelesssinteringofsiliconcarbideThepressurelesssinteringequipmentissimpleandeasytoindustrialproduction,whichisthemostbasicsinteringmethod.Thismethodisalsowidelyusedinthesinteringofnanoceramics,mainlythroughtheselectionofsinteringsystemtoachievethedensificationofgreenbodywiththeleastgraingrowth.Becauseinthesinteringprocess,coarsening,densificationandgraingrowthoccurTheresultsshowthattheactivationenergyofgraincoarsening,billetdensificationandgraingrowtharedifferentindifferenttemperaturerange.Byusingthisrelationship,thesinteringconditionswithhighdensificationrateandslowgraingrowthcanbeobtainedbycontrollingthesinteringtemperature.Thecontrolofsinteringsystemismainlytocontrolthespeedoftemperaturerise(drop),holdingtimeandmaximumtemperature.Themostcommonlyusedpressurelesssinteringisisokineticsintering.Electricheatingmethodismainlyusedinpressurelesssintering.Accordingtodifferentrequirements,therearethreekindsofelectricheatingelements:heat-resistantalloyresistancewire,themaximumheatingtemperatureis1100℃,thegeneralusetemperatureis≤1000℃;siliconcarbideresistancerod,themaximumheatingtemperatureis1550℃,thegeneralusetemperatureis≤1450℃,molybdenumdisilicideresistancerod,themaximumusetemperatureinoxidizingatmosphereis1700℃,thegeneralusetemperatureis≤1600℃,and1700℃inreducingatmospherecanbecomparedItcanbeusedforalongtime;thegraphiteheatercanbeusedinnonoxidizingatmospherewiththemaximumtemperatureupto2000℃.Pressurelesssinteringisabasicsinteringmethod.Thismethodisnotonlysimpleandeasytooperate,butalsosuitableforfiringobjectsofdifferentshapesandsizes,andthetemperaturesystemiseasytocontrol.Itispreciselybecauseinthepressurelesssinteringprocess,theonlycontrolmeansforsinteringdensificationprocessaretemperatureandheatingrate,sotheresearchondensificationprocessandmicrostructuredevelopmentisthemostsignificantandactive.