PTFE ke thepa ea bohlokoa haholo hobane e na le motsoako o ikhethang oa thepa.PTFE e na le lik'hemik'hale tse sa tsitsang, boemo ba leholimo, motlakase o babatsehang oa ho kenya motlakase, ho hanyetsa mocheso o phahameng, palo e tlaase ea likhohlano le thepa e sa khomarelang.
Li-polymers li sebelisoa hangata ho etsa le boenjiniere, leha ho le joalo, lipatlisiso tse hatisitsoeng tse hlalosang thepa ea tsona ea mochini li bonahala li sa emeloe hanyane ka lebaka la bohlokoa ba tsona.Boholo ba lintlha tse hlahisitsoeng, hangata li fana ka tlhahisoleseling e sa lekaneng mabapi le leloko la polima e lekiloeng le nalane ea eona ea ts'ebetso.Mohlomong ke hobane ho theha sebopeho sa lisebelisoa tsa motheo hangata ho thata joalo ka ho etsa liteko tsa 'nete tsa mochini.Ho feta moo, mohlala o nepahetseng oa khomphutha oa karabelo ea mochini oa polymer o ntse o qala.Mekhoa e mengata ea liteko e sebelisoa hangata, empa hangata ha e nepahale ka ntle ho moeli o moqotetsane.Lebaka le leng la sena, ntle le ho rarahana ha karabelo ea polymer, ke hore hangata data ha e fumanehe ka ntle ho moeli o moqotetsane oa liteko ho phephetsa le ho holisa ho tiea ha mefuta e matla kapa ea phenomenological.Mona, re fana ka liphetho tsa pele tsa boikitlaetso bo fapaneng bo reretsoeng ho utloisisa karabelo ea mochini oa polima e tsebahalang ho tsoa ponong ea liteko le hamorao, hammoho le tlhahiso ea mofuta o matla oa khopolo-taba o ka kengoang ts'ebetsong likhoutung tsa khomphutha. .
Polymer e hlalositsoeng thutong ena ke poly(tetrafluoroethylene) (PTFE).E khethiloe ka mabaka a 'maloa, ho kenyelletsa le tšebeliso ea eona e le thepa e tloaelehileng ea boenjiniere bakeng sa likarolo tse nyenyane tse sebetsang hantle le ho fumaneha ha eona ho tsoa ho bahlahisi ba' maloa.Le hoja e ithutoa haholo nakong e fetileng, e fumane tlhokomelo e fokolang libukeng tse bulehileng ka lilemo tse 25 tse fetileng.Re khethile ho hlahloba boitsebiso bona hape ka lebaka la ho rarahana ha eona le ho hloka boitsebiso ba mechine.PTFE ke boitsebiso bo tsotehang ka litsela tse ngata .E bonts'a thepa ea bohlokoa ho feta mocheso o pharalletseng oa polymer efe kapa efe;PTFE e boloka tekanyo e itseng ea ductility ho 4 K le maemong a mang e sebelisoa lits'ebetsong ho 540 8C .Ha e qhibilihe ka har'a metsoako eohle e tloaelehileng 'me e hanyetsa hoo e batlang e le lisebelisoa tsohle tsa acidic le caustic.PTFE e na le har'a matla a phahameng ka ho fetesisa a thepa efe kapa efe, matla a phahameng haholo a dielectric le tahlehelo e tlase ea dielectric.The coefficient of the sliding friction between PTFE le many engineering materials a tlase haholo mme ha sintered with wear reduction compounds, ho thehwa sehlopha sa bohlokwa diindastering sa thepa ya ho jara.Ho kopantsoe le coefficient ea eona e tlase ea khohlano le botsitso ba lik'hemik'hale, PTFE e batla e sa khonehe hore lisebelisoa tse ling li khomarele.Hangata thepa ena e sebelisoa theknoloji ea ts'ebetso ea indasteri moo boiketlo ba ho hloekisa bo leng bohlokoa.Karolo e 'ngoe ea PTFE e e entseng hore e se ke ea sebelisoa haholo indastering le ea boenjiniere ke viscosity ea eona e phahameng ea ho qhibiliha (1011 P ho 380 8C).Sena se thibela ente le ho bōptjoa ha moea hore ho se khonehe 'me ho na le mekhoa e theko e boima feela ea tlhahiso ea sintering le extrusion bakeng sa tlhahiso ea karolo.
Pampiri ena e tsepamisitse maikutlo holim'a sebopeho sa lisebelisoa tsa motheo le karabelo e hatellang ea lisebelisoa tsa PTFE tse fapaneng ka maemo a fapaneng le mocheso.Lipampiri tsa nako e tlang li tla sebetsana le karabelo e tsitsitseng le ea ho kuta, litlamorao tse qaqileng tsa kristale ea polymer, boits'oaro ba boloi le ho ts'oha le nts'etsopele ea mohlala o sebetsang oa theory.
Patlisiso e nyane haholo ea pejana mabapi le thepa ea khatello ea PTFE e phatlalalitsoe.Lipatlisiso tse ling mabapi le thepa ea creep li teng, empa mabapi le engineeringdeformation, ke litšupiso tse tšeletseng feela tse hlokometsoeng ke bangoli.Ka 1963, Davies o ile a hatisa pampiri e mabapi le nts'etsopele ea sistimi ea Split-Hopkinson bar.E le karolo ea tlaleho ena, mocheso o le mong oa mocheso oa kamore / sekhahla sa khatello ea PTFE se hlahisitsoe z1700 sK1 .Mathata a phahameng a behiloeng tsamaisong ena e ne e le 3% feela.Lintlha tse ling tsa sekhahla sa maemo a holimo ho polymer khahlano le mocheso li phatlalalitsoe ke Gray le Walley.Koo o phatlalalitse lintlha tsa khatello ea maikutlo / khatello bakeng sa sehlahisoa sa Imperial Chemical Industries PTFE se bitsoang Halon G-80 ka 1965.Liphello tsa mocheso karabelo ea mochine le tsona li ile tsa tšohloa ka bokhutšoanyane.
Nako ea poso: Aug-16-2016