共查询到20条相似文献,搜索用时 93 毫秒
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1 INTRODUCTIONAluminumbronzeisanimportantengineeringmateri alduetoitsexcellentphysical ,mechanical,anti corro sionandwearresistingproperties .Ourresearchgroupde velopedaspecialtypeofhighstrength ,wear resistinga luminumbronze(KK ) ,whichisexceptionallygoodfor… 相似文献
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Industrial preparation and performance testing of property-modified prebaked carbon anodes for aluminum electrolysis 总被引:1,自引:0,他引:1
1 INTRODUCTIONItiswellknownthataluminumelectrolysisisa“largefamily”ofelectroenergyconsumption .Inthemeantime ,carbonanodesareusedupcontinuouslyintheprocessofelectrolysis ,sothealuminumelectrolysisisal socalled“largefamily”ofcarbonconsumption .Foralongtime… 相似文献
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1 INTRODUCTIONTantalumcanbeoxidizedatlowtemperaturein toinactiveTa2 O5 withcompacttextureandspecificresistanceof 1 0 18Ω·cm[1],whichentitlestantalumgoodcorrosionresistanceandelectricresistance ,andalsomakesitimpossibletogetthickTa2 O5 filmsatlowtemperature .Theo… 相似文献
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Influence of heat treatment on tribological behaviors of novel wrought aluminum bronze 总被引:4,自引:1,他引:4
1 INTRODUCTIONAluminumbronzepossessesexcellentphysical,mechanicalandtribologicalproperties .Itisavailableformakingwear resistingan 相似文献
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1 INTRODUCTIONThefatiguelifeofthemetalmaterialsisthebasicdataforcalculatingtheintensityofthepartsofthemechanicalproducts .Ingeneral,thefatiguelifetestdataareobtainedthroughtheruinoustestonthema terialspecimen .Butthetimeofthefatiguelifetestislongandthec… 相似文献
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1 INTRODUCTIONThestudyofmoltenstructureofCaO SiO2 ,whichactasthebasicfactorinfluencingthephysicalandchemicalpropertiesofthesilicat 相似文献
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1 INTRODUCTIONThethreebasicstepsinzinchydrometallurgyareleaching ,purificationandelectrolysis .Theelectrolyt ic processinvolves passinganelectricalcurrentthroughinsolubleelectrodestocausethedecomposi tionofanaqueouszincsulfateelectrolyteandthede positiono… 相似文献
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Ternary alloying of Mo_5Si_3 with Zr, Ti, Co and V 总被引:2,自引:1,他引:1
1 INTRODUCTIONSilicidesareusedasvariousprotectivecoatingsa gainstwear ,corrosionandoxidation ,andasintegrat edcircuitfilmsbecauseoftheirhighhardness ,highelectricalandthermalconductivityandgoodoxidationresistanceathightemperatures .Inparticular ,MoSi2isputi… 相似文献
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1 INTRODUCTIONAtpresent ,zincisproducedbythehydrometallurgy electroanalysismethodinmostzincsmeltingplants .Eachyear,millionstonsofhydrometallurgicalzincresiduesaredischargedfromChinesesmeltingplants ,whicharehighlyacidicandconsistofgreatdealofsilverandot… 相似文献
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Structure and characteristics of electrodeposited RE-Ni-W-P-B_4C-PTFE composite coatings 总被引:3,自引:0,他引:3
1 INTRODUCTIONNi W Palloy possessesexcellentmagnetism ,strength ,goodheat resistanceandidealwearandcor rosionresistance ,whichhasattractedthesurfacefin ishingandengineeringcommunitiesformanyyears[1,2 ] .B4 Cisakindofceramicpowerwithhighhardnessandfinewear resis… 相似文献
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1 INTRODUCTIONTheHDsinteringmodelwasintroducedinRef.[1 ],anditconsideredthattherealwaysexistshrink ingandexpandingmechanismsduringsinteringpro cess,althoughmostPMmaterialwillshrinkonlyphenomenallywhensintered ,thatistosay ,itisdif ficulttoemergetheexpanding… 相似文献
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石墨含量对铜基滑板烧结膨胀的影响 总被引:14,自引:4,他引:14
研究了石墨含量对Cu基滑板烧结膨胀的影响与作用机理,石墨的体积百分数依次为0、7.1%、12%、13.5%、16.6%,其对应的体膨胀率依次为-6.4%、4.6%、16%、21%、32%。膨胀机制是石墨阻碍金属颗粒形成烧结颈,使烧结初期因释放应变能和排放成型剂而引起的膨胀得以保留。烧结膨胀率与石墨含量近似于线性关系 相似文献
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TiB2陶瓷活化烧结及制备技术 总被引:2,自引:1,他引:1
TiB2材料具有高熔点、高硬度、耐磨、耐腐蚀、抗氧化以及导电性好和导热性好等优点,是一种具有广泛应用前景的新型陶瓷材料。但是其极强的共价键晶体结构和较低的自扩散系数,使得其很难获得致密的陶瓷材料。主要从添加助烧剂和烧结技术两方而介绍了TiB2陶瓷活化烧结方法的研究进展,并分析了该技术促进材料烧结致密化的机制,同时介绍了热压烧结和放电等离子(SPS)烧结技术。 相似文献
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烧结工艺对超细WC-6%Co-0.6%(VC/Cr_3C_2/TaC)硬质合金性能的影响 总被引:1,自引:1,他引:0
硬质合金的性能随烧结工艺的不同而会发生变化,本文在1 380℃,经真空烧结和压力烧结(4 MPa)制备超细WC-6%Co-0.6%(VC/Cr3C2/TaC)(质量分数)硬质合金,分别采用SEM分析、XRD检测、钴磁检测、矫顽磁力检测、洛氏硬度检测、抗弯强度检测等方法,对比研究了真空烧结和压力烧结对合金显微组织和力学性能的影响。结果表明:与真空烧结相比,压力烧结提高了合金的相对密度,降低了孔隙度,从而提高了合金的综合性能。本次实验中,压力烧结条件下制备的合金相对密度为99.4%,孔隙度为A02B00,硬度为93.8 HRA,TRS为1 830 MPa。 相似文献
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烧结温度对Ti(CN)基金属陶瓷成分和显微结构的影响 总被引:1,自引:1,他引:0
本文采用化学分析、扫描电镜(SEM)、能谱(EDS)、X射线衍射(XRD)、多气氛脱胶-烧结一体炉等方法和手段,对Ti(CN)基金属陶瓷压坯在不同温度烧结过程中的化学成分变化,相成分变化、显微组织演变和压坯收缩等进行了系统的研究。在Ti(CN)基金属陶瓷烧结过程中,碳含量和氧含量在1100~1300℃之间快速降低,在1300℃时形成氮分解峰,在液相出现后,氮分解基本上停止,当烧结温度在1500℃以上时,氮的分解加快。TaC相和Mo2C相在1200℃消失,WC相在1300℃消失。因此认为,在800~1350℃之间固相烧结阶段,必须控制好升温速度,最好分段保温;烧结温度不能超过1500℃。 相似文献
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A type of polymer-coated molybdenum powder used in selective laser sintering technology was prepared by coating polymer on molybdenum particles and frozen grinding techniques, with the maximum particle diameter of 71 μm. The laser sintering experiments of polymer-coated molybdenum powder were conducted by using the self-developed selective laser sintering machine (HLRP-350I). The method of microscopic analysis was used to investigate the dynamic laser sintering process of polymer-coated molybdenum powder. Based on the study, the laser sintering mechanisms of polymer-coated molybdenum powder were presented. It is found that the mechanism is viscous flow when the laser sintering temperature is between 100 ℃ and 160 ℃, which can be described by a two-sphere model; and the mechanism is melting/solidification when the temperature is above 160 ℃. 相似文献
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