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LUO Shou jing 《中国有色金属学会会刊》2000,10(3)
1 INTRODUCTIONBecauseoftheirhighspecificstrengths,specificmoduli,wearresistanceandthermalstability,theAlbasedcompositesreinforcedbyceramicparticleshaveattractedmuchinterestinthedevelopmentofmanufacturingprocessesforsuchcomposites.Thefabricationprocesse… 相似文献
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Laser induced TiC particle reinforced composite layer on Ti6Al4V and their microstructural characteristics 总被引:7,自引:3,他引:4
1 INTRODUCTIONMetal ceramiccompositecoatingshavewidelybeenbuiltupbymeansofthermalsprayorlasertech niquesontraditionalengineeringmaterialsforim provingtheirperformancesrelatedtocorrosionandwearetc[1~ 5 ].However ,metal ceramicorcermetcompositesaremulti phase… 相似文献
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1 INTRODUCTIONInterfacesubjectplaysanimportantroleinbio materialsfield .Theinterfacecharacteristicinsidecompositebiomaterialandthatbetweenbiomaterialandlivingtissuestraightlyinfluencethemechanicalpropertiesandbiocompatibility .Forinstance,hy droxyapatite… 相似文献
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1 INTRODUCTIONTitaniummatrixcompositesareinterestingforhightemperatureandhighstrengthapplication .Usu ally ,matricesarereinforcedbycontinuoussiliconcar bidefilaments .Threemainproblemshavebeeniden tifiedinSiC/Ticompositesmaterials :( 1)unstabilitybetweenthef… 相似文献
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1 INTORDUCTIONMechanicalactivationisakindofpre treatmenttechnologyinproductionofcomposites ,especiallyparticlereinforcedmetalmatrixcomposites .Itin cludeshightemperatureself propagatingsynthesis[1] ,hot pressingsynthesis[2 ,3 ] andin situlasersynthe sis[4 ,5] etc .D… 相似文献
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BIAN Zhan 《中国有色金属学会会刊》2000,10(3)
1 INTRODUCTIONThecrystallizationbehaviorinmulticomponentamorphousalloysiscomplicated,dependinggreatlyonalloycompositionandmicrostructure,heatingprocessandascastamorphousstate,andsoon.Sometimesmetastablephasesappearbeforethermallystableequilibriumphase.T… 相似文献
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1 INTRODUCTIONSemi solidforminghasawideuseforitsimprov ingproductqualityanddecreasingcosts[1~ 3] .Itiscomposedofthreemainprocesses ,suchassemi solidmaterialproduction ,partialremeltingandthixoform ing .Amongthose ,thesemi solidbilletproductionisthemostimportan… 相似文献
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1 INTRODUCTIONSprayforminghasbeenconsideredtobeasuit abletechnologyforthepreparationofparticulaterein forcedmetalmatrixcomposites (MMCs) ,andhasbeenwidelyinvestigatedrecentyears[1~3] .Compositematerialspreparedbysprayformingprocessexhibitattractivecharacter… 相似文献
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DONG Yin sheng 《中国有色金属学会会刊》2000,10(3)
1 INTRODUCTIONFromthestudyofrapidlysolidifiedpowdersofdifferentsizesusingmodernTEM,theinformationofcomposition,distributionandcrystalstructureofmetastablephasesformedduringrapidsolidificationprocesscanbegotten.Besides,itcanprovidethetheoreticalfoundati… 相似文献
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TU Jiang ping 《中国有色金属学会会刊》2000,10(3)
1 INTRODUCTIONWhiskerreinforcedaluminumcompositeshavebeenofgreatinterestfortheirhighspecificstrength,highmodulusandhighwearresistance.Severalstudies[1~5]ontheerosionofmetalmatrixcomposites(MMCs)haveshownthattheseadvancedengineeringmaterialserodemorerapid… 相似文献
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1 INTRODUCTIONCorrosionisoneofthemostimportantreasonsforthefailureofmetallicbiomaterialsimplantedinhumanbody .Researchingtheimplantedmetals’cor rosionshouldconsidermanyfactors ,suchasthepropertiesofthematerials ,thecompositionofthebodyfluids ,thechangeofp… 相似文献
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不锈钢在含SO2-4稀HCl中的电化学腐蚀行为 总被引:3,自引:2,他引:3
应用电化学测量技术研究了1Cr18Ni9Ti和316L在含硫 酸盐(SO2-4)的稀HCl介质中的腐蚀行为。极化曲线测量结果表明,SO2-4 能显著抑制1Cr18Ni9Ti的点蚀,而对316L的腐蚀有加速作用并降低其钝化性能。电化学阻抗 谱测量结果表明,不锈钢表面钝化膜的保护性随着温度升高而降低。 相似文献
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采用PASTAT30型恒电位仪测试了SUS 316奥氏体不锈钢钨极氩弧焊TIG,熔化极氩弧焊MIG和钨极氩弧焊加填丝TIG M焊缝金属的电化学腐蚀性能.结果表明,在质量分数9.8%H2SO4溶液中,母材及焊缝的抗电化学腐蚀能力由大到小的顺序为母材>TIG M焊缝>MIG焊缝>TIG焊缝,在质量分数5.0%HCl溶液中为母材>MIG焊缝>TIG M焊缝>TIG焊缝,由此可知TIG焊缝金属的抗腐蚀能力最弱.由Tafel曲线可知,SUS316奥氏体不锈钢在H2SO4溶液中的钝化区间较长,在HCl溶液中的钝化区间很短暂,所以不锈钢在盐酸溶液比硫酸溶液中抗腐蚀性能差.晶间腐蚀试验结果与9.8%H2SO4溶液中电化学腐蚀试验结果相同. 相似文献
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不同模拟体液及pH值变化对人体用金属生物材料耐蚀性能的影响 总被引:8,自引:0,他引:8
牟战旗 《中国腐蚀与防护学报》1998,18(2):126-130
采用Ringer's溶液,PBS(-)溶液和Hank's溶液,研究了不同模拟体液和pH值对316L不锈钢、Co-Cr合金和Ti-6Al-4V合金生物医学材料耐蚀性能的影响。结果表明,不同模拟体液的侵蚀性是不同的,侵蚀性由强到弱的顺序为Ringer's>PBS(-)>Hank's溶液。RBS(-)和Hank's溶液中的HPO 4~(2-)、H_2PO_4~(2-)和SO_4~(2-)、葡萄糖,对生物材料的腐蚀起到一定的缓蚀作用。pH降低,对316L不锈钢和Co-Cr合金的耐蚀性能有较大的影响,而对Ti-6Al-4V合金影响较小。 相似文献
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对一种双相不锈钢设计并进行了不同的热处理,研究了不同热处理后双相不锈钢的组织、相结构、硬度及在几种腐蚀介质中的腐蚀特性.结果表明:提高固溶温度可略提高双相不锈钢的硬度而基本不影响其耐蚀性;固溶后时效使δ相中析出σ相,一些δ相转变为γ相,钢的硬度显著增加.阳极极化实验表明时效后双相不锈钢的耐蚀性较固溶态降低,降低程度与腐蚀介质有关;在1 mol/L NaCl中,时效后双相不锈钢的耐蚀性剧烈降低;但时效对双相不锈钢在0.2 mol/L H2SO4与1 mol/L H3PO4中的钝化区基本无影响.由于材料的腐蚀磨损抗力与其耐蚀和耐磨能力均有关,因此在一定服役条件下,可以通过时效适当提高双相不锈钢的硬度来提高其腐蚀磨损抗力. 相似文献
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Corrosion resistance of electrodeposited RE-Ni-W-P-SiC-PTFE composite coating in phosphoric and ferric chloride 总被引:8,自引:0,他引:8
1 Introduction During process, store and use in various kinds of environment, corrosion, wear, fatigue and rupture may happen in all materials and products. These kinds of failure and damages widely occur in industries, causing enormous losses to nationa… 相似文献
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LI Xin-geng> FU Min HE Ja-wen Shandong Electric Power Research Institute of China Jinan China .State Key Laboratory for Mechanical Behavior of Materials Xi''''an Jiaotong University Xi''''an China 《材料热处理学报》2004,25(5)
Cr-Ni STAINLESS steel has been widely applied invarious industries for its promising mechanicalproperties and corrosion resistance at elevatedtemperature.But it's vulnerable in highly corrosiveenvironments with both oxygen and sulfur,such asSOa-Oa mixture gaseous.A number of studies claimed that the corrosionaspect of Fe-Cr-Ni alloy in SO2or62atmospherefollows Wagner's rule.The corrosion mechanism isassociated with mutual diffusion of ions of base metaland corrosion media in the scale[… 相似文献
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