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ID:33365145
大小:2.89 MB
页数:96页
时间:2019-02-25
《氢化钛热分解反应动力学与铝合金熔体泡沫化过程研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要泡沫铝合金在高技术和民用领域中有重要应用。针对泡沫铝合金制各的现存问题,需要揭示发泡剂氢化钛的产气规律,以供研究和控制铝合金熔体的泡沫化过程,从而成功制备具有独特性能的泡沫铝台金。本文制备了小孔径(D<1film)、低孔隙率(65%2、kJ/tool。利用这些理论,结合定温预分解差谱技术,解叠了氢化钛的科序升温热分解谱线.首次求得了氢化钛热分解反应动力学参数和动力学方程组。据此方程组,计算得到了在940/(时,氢化钛的热分解量对时间的天系线,它与铝台金熔体泡沫化过程相吻合.首次为研究和控制锅台金熔体泡沫化过程提供了理论依据。首次提出了测定铝合金熔体泡沫孔结构参数的“瞬时冻结”凝崩法。研究发现:在一定的搅拌时间内。熔体泡沫的孔隙率保持恒定。在该搅拌时间范围内,当搅拌时间短时,待分解的氢化钛就多,制得的样晶的孔隙率就大;当搅拌时间长时,待分解的氢化钛就少,制得的样品的孔隙率就小。据此规3、律,成功地制得了小孔径(D4、9982001)、国家自然科学基金项目(No.5047105、31,No.50081002)文中内容请勿扩散-I·东南大学博L学位论义ABSTRACTAIalloyfoamisakindofnewmaterialwhichhasimportantapplicationsinbothhigh-techandciviIfieldsFocountertheexistingprobleminpreparingAIalloyfoam,itisnecessarytorevealtheruleofhydrogenproductionfromthermaldecompositionoftitaniumhydride,which6、furnishesthebasisforstudyingandcontrollingtheAIalloymeltfoamingprocess,thussuccessfullypreparingAIalloyfoamwithexcellentfeatures.Inthispaper,theAIalloyfoamwithsmallporediameter(D<1mm)lowporosity(65%<尸'<75%)issuccessfullyprepared.Atemperatureprogrammeddecomposition(TPD)apparatus7、withmetaltubestructure,inwhichArisusedasthecarriergas,isestablished.Itiswe,YANGDonghui,HEDepingandYANGShangrun,whohavefirstlyrecordedtheTPDspectrumoftitaniumhydridebyusingtheTPDapparatusItisthefirsttocompletelyapplytherelatedtheoriesoftemperatureprogrammeddesorption,whichinclud8、espectrogramsuperpositionmethod,consultingtablemethod(CTM)andisodesorptionratemethod,totemperatureprogrammeddecomposition,andtobroadentheapplicationrangeofCTMtothepeakmaximumtemperature厶=300-1100KandtheactivationenergyEa=100-740kJ/m01.TheTPDspectrumoftitaniumhydrideisseparateda9、ndsimulatedintoindividualpeaksbyutilizingthesetheories
2、kJ/tool。利用这些理论,结合定温预分解差谱技术,解叠了氢化钛的科序升温热分解谱线.首次求得了氢化钛热分解反应动力学参数和动力学方程组。据此方程组,计算得到了在940/(时,氢化钛的热分解量对时间的天系线,它与铝台金熔体泡沫化过程相吻合.首次为研究和控制锅台金熔体泡沫化过程提供了理论依据。首次提出了测定铝合金熔体泡沫孔结构参数的“瞬时冻结”凝崩法。研究发现:在一定的搅拌时间内。熔体泡沫的孔隙率保持恒定。在该搅拌时间范围内,当搅拌时间短时,待分解的氢化钛就多,制得的样晶的孔隙率就大;当搅拌时间长时,待分解的氢化钛就少,制得的样品的孔隙率就小。据此规
3、律,成功地制得了小孔径(D4、9982001)、国家自然科学基金项目(No.5047105、31,No.50081002)文中内容请勿扩散-I·东南大学博L学位论义ABSTRACTAIalloyfoamisakindofnewmaterialwhichhasimportantapplicationsinbothhigh-techandciviIfieldsFocountertheexistingprobleminpreparingAIalloyfoam,itisnecessarytorevealtheruleofhydrogenproductionfromthermaldecompositionoftitaniumhydride,which6、furnishesthebasisforstudyingandcontrollingtheAIalloymeltfoamingprocess,thussuccessfullypreparingAIalloyfoamwithexcellentfeatures.Inthispaper,theAIalloyfoamwithsmallporediameter(D<1mm)lowporosity(65%<尸'<75%)issuccessfullyprepared.Atemperatureprogrammeddecomposition(TPD)apparatus7、withmetaltubestructure,inwhichArisusedasthecarriergas,isestablished.Itiswe,YANGDonghui,HEDepingandYANGShangrun,whohavefirstlyrecordedtheTPDspectrumoftitaniumhydridebyusingtheTPDapparatusItisthefirsttocompletelyapplytherelatedtheoriesoftemperatureprogrammeddesorption,whichinclud8、espectrogramsuperpositionmethod,consultingtablemethod(CTM)andisodesorptionratemethod,totemperatureprogrammeddecomposition,andtobroadentheapplicationrangeofCTMtothepeakmaximumtemperature厶=300-1100KandtheactivationenergyEa=100-740kJ/m01.TheTPDspectrumoftitaniumhydrideisseparateda9、ndsimulatedintoindividualpeaksbyutilizingthesetheories
4、9982001)、国家自然科学基金项目(No.504710
5、31,No.50081002)文中内容请勿扩散-I·东南大学博L学位论义ABSTRACTAIalloyfoamisakindofnewmaterialwhichhasimportantapplicationsinbothhigh-techandciviIfieldsFocountertheexistingprobleminpreparingAIalloyfoam,itisnecessarytorevealtheruleofhydrogenproductionfromthermaldecompositionoftitaniumhydride,which
6、furnishesthebasisforstudyingandcontrollingtheAIalloymeltfoamingprocess,thussuccessfullypreparingAIalloyfoamwithexcellentfeatures.Inthispaper,theAIalloyfoamwithsmallporediameter(D<1mm)lowporosity(65%<尸'<75%)issuccessfullyprepared.Atemperatureprogrammeddecomposition(TPD)apparatus
7、withmetaltubestructure,inwhichArisusedasthecarriergas,isestablished.Itiswe,YANGDonghui,HEDepingandYANGShangrun,whohavefirstlyrecordedtheTPDspectrumoftitaniumhydridebyusingtheTPDapparatusItisthefirsttocompletelyapplytherelatedtheoriesoftemperatureprogrammeddesorption,whichinclud
8、espectrogramsuperpositionmethod,consultingtablemethod(CTM)andisodesorptionratemethod,totemperatureprogrammeddecomposition,andtobroadentheapplicationrangeofCTMtothepeakmaximumtemperature厶=300-1100KandtheactivationenergyEa=100-740kJ/m01.TheTPDspectrumoftitaniumhydrideisseparateda
9、ndsimulatedintoindividualpeaksbyutilizingthesetheories
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