陶瓷注射成形工藝及流變特性研究.pdf

1、華中科技大學(xué)碩士學(xué)位論文陶瓷注射成形工藝及流變特性研究姓名：王斌申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：肖建中夏風(fēng)20050430IIAbstractTheobjectiveofthisstudywastoevaluatetheeffectsofthedependenceoftherheologicalbehaviouronthesolidloadingfceramicinjectionmoulding.Theaveragepartic

2、lesizedistributiondecideonthesolidloading.Ftherequirementofinjectionmoldingthecalciningmillingweredoneindertoincreasethetapedensityofpowderimproveparticleshapesizedistribution.ThemodeofMaronPiercewasusedtoevaluatetheproc

3、essingofpowdertreatment.Thesuitablecaliningtemperaturemillingtimehadbeengiven.Meoverthethermaldecomposeofbinderwasstudiedaccdingtorequirementofthefeedstocksviscositytheprocessingofthermaldebinder.Theidealbindersystemswas

4、achievedfceramicinjectionmoulding.Thestatisticprincipletherheologyacteristicoffeedstockwasintroducedtoestimatetheunifmityoffoodstocks.Therheologicalbehavioffeedstockisverykeytoinjectionmoulding.Ceramicinjectionmouldingwa

5、sfittedwiththepowerlawmodel.Thepowerlawindex“n”expressesthedegreeofshearsensitivityn1.Theviscosityisthemostimptantrheologicalparameterfpowderinjectionmoulding.Inthispapertheviscositywasmeasuredbythecapillaryrheometer.Acc

6、dingtotherheologydatetheactivationengerywascalculatedbyArrheniustypeequationtheyieldstresscanbeobtainedbyCassonmodel.Furthermefthenecessityofinjectionmoldingtheidealbindersystemsolidloadinghadbeengiven.Fnearshapemoldingt

7、hemoldingmachineneedstobecontrolledaccurately.Moldingprocessofthefeedstockwasinvestigated.Theresultsshowthatmoldingtemperatureinjectionholdpressuretemperatureofmouldtimeofkeepingpressurecoolingarekeyprocessingparameters.