Ntau yam cuam tshuam rau cov kabmob sib txhuam

Ntau yam cuam tshuam rau cov kabmob sib txhuam
1. Nto khoom
Vim muaj kuab paug, tshuaj lom neeg cua sov, electroplating thiab lubricants, thiab lwm yam., ib tug nyias nto zaj duab xis (xws li oxide zaj duab xis, sulfide zaj duab xis, phosphide zaj duab xis, chloride zaj duab xis, indium zaj duab xis, cadmium zaj duab xis, aluminium zaj duab xis, thiab lwm yam.) hlau nto.), kom cov txheej saum npoo muaj cov khoom sib txawv ntawm cov substrate.Yog hais tias cov zaj duab xis nto yog nyob rau hauv ib tug tej yam thickness, qhov chaw tiv tauj tiag tiag yog tseem sprinkled nyob rau hauv lub hauv paus cov ntaub ntawv es tsis txhob ntawm cov zaj duab xis nto, thiab lub zog shear ntawm nto zaj duab xis yuav ua tau qis dua li ntawm lub hauv paus khoom;ntawm qhov tod tes, nws tsis yooj yim rau kev tshwm sim vim muaj cov yeeb yaj kiab nto.Adhesion, yog li qhov kev sib txhuam quab yuam thiab kev sib txhuam tuaj yeem raug txo kom haum.Cov zaj duab xis nto thickness kuj muaj kev cuam tshuam zoo rau kev sib txhuam.Yog hais tias cov zaj duab xis saum npoo yog nyias heev, zaj duab xis yog yooj yim crushed thiab ncaj qha kev sib cuag ntawm cov khoom siv substrate tshwm sim;Yog hais tias cov zaj duab xis saum npoo yog tuab heev, ntawm ib sab, qhov chaw sib cuag tau nce vim yog cov yeeb yaj kiab mos, thiab ntawm qhov tod tes, cov micro-peaks ntawm ob qhov chaw yog qhov cuam tshuam rau ntawm cov yeeb yaj kiab saum npoo yog ntau dua. tseem ceeb.Nws tuaj yeem pom tias zaj duab xis saum npoo muaj qhov zoo tshaj plaws thickness tsim nyog nrhiav.2. Cov khoom siv Cov khoom sib txhuam coefficient ntawm cov hlau sib txhuam sib txawv nrog cov khoom ntawm cov khoom ua ke.Feem ntau hais lus, tib cov hlau los yog hlau sib txhuam ua ke nrog ntau dua kev sib nrig sib solubility yog nquag adhesion, thiab nws qhov kev sib txhuam loj dua;ntawm qhov tsis sib xws, qhov kev sib txhuam me me.Cov khoom ntawm cov qauv sib txawv muaj qhov sib txawv ntawm kev sib txhuam.Piv txwv li, graphite muaj cov txheej txheem ruaj khov thiab kev sib txuas me me ntawm cov khaubncaws sab nraud povtseg, yog li nws yooj yim rau swb, yog li qhov kev sib txhuam me me;Piv txwv li, cov kev sib txhuam ntawm pob zeb diamond khub tsis yooj yim rau lo vim nws qhov siab hardness thiab qhov chaw sib cuag me me, thiab nws qhov kev sib txhuam tseem yog siab.me me.
3. Qhov cuam tshuam ntawm qhov kub ntawm qhov nruab nrab ntawm qhov nruab nrab ntawm qhov kev sib txhuam yog feem ntau tshwm sim los ntawm kev hloov ntawm cov khoom ntawm cov khoom nto.Cov kev sim ntawm Bowden et al.qhia tau hais tias kev sib txhuam yam ntawm ntau cov hlau (xws li molybdenum, tungsten, tungsten, thiab lwm yam) thiab lawv cov tebchaw, Qhov tsawg kawg nkaus tus nqi tshwm sim thaum qhov nruab nrab qhov nruab nrab yog 700 ~ 800 ℃.Qhov tshwm sim no tshwm sim vim qhov pib kub nce siab txo lub zog shear, thiab qhov kub ntxiv nce ntxiv ua rau cov txiaj ntsig taw tes poob qis, ua rau thaj chaw sib cuag tau nce ntau.Txawm li cas los xij, nyob rau hauv cov ntaub ntawv ntawm polymer kev sib txhuam khub los yog kev ua haujlwm siab, kev sib txhuam coefficient yuav muaj qhov siab tshaj plaws nrog kev hloov ntawm qhov kub thiab txias.
Nws tuaj yeem pom los ntawm cov saum toj no tias qhov cuam tshuam ntawm qhov kub thiab txias ntawm qhov kev sib txhuam yog hloov tau, thiab kev sib raug zoo ntawm qhov kub thiab kev sib txhuam yuav nyuaj heev vim muaj kev cuam tshuam ntawm kev ua hauj lwm tshwj xeeb, cov khoom siv, oxide zaj duab xis hloov thiab lwm yam. cov
4. txheeb ze txav ceev
Feem ntau, zawv zawg ceev yuav ua rau saum npoo cua sov thiab kub nce, yog li hloov cov khoom ntawm qhov chaw, yog li qhov kev sib txhuam yuav hloov raws li.Thaum tus txheeb ze zawv zawg ceev ntawm qhov sib txuas ntawm qhov sib txhuam ntawm qhov sib txhuam ntau tshaj 50m / s, ntau qhov kev sib txhuam kub yog tsim rau ntawm qhov chaw sib cuag.Vim lub sij hawm luv luv ntawm kev sib cuag ntawm qhov taw tes, qhov loj ntawm kev sib txhuam ntawm cov cua sov tsim tawm tam sim ntawd tsis tuaj yeem diffuse mus rau sab hauv ntawm lub substrate, yog li cov cua kub sib txhuam yog concentrated nyob rau hauv txheej txheej, ua rau qhov kub thiab txias thiab ib txheej molten tshwm. .Cov hlau molten plays lub luag haujlwm lubricating thiab ua rau kev sib txhuam.Qhov tseem ceeb txo qis thaum qhov nrawm nce.Piv txwv li, thaum zawv zawg ceev ntawm tooj liab yog 135m / s, nws qhov kev sib txhuam yog 0.055;Thaum nws yog 350m / s, nws raug txo mus rau 0.035.Txawm li cas los xij, kev sib txhuam ntawm qee cov ntaub ntawv (xws li graphite) tsis tshua muaj kev cuam tshuam los ntawm kev zawv zawg ceev, vim tias cov khoom siv ntawm cov ntaub ntawv no tuaj yeem tswj tau ntau qhov kub thiab txias.Rau ciam teb kev sib txhuam, nyob rau hauv qhov tsawg ceev ntau yam uas qhov ceev yog qis dua 0.0035m / s, uas yog, qhov kev hloov ntawm zoo li qub kev sib txhuam mus rau dynamic kev sib txhuam, raws li qhov ceev nce, kev sib txhuam coefficient ntawm cov adsorption zaj duab xis maj mam txo thiab nyhav rau ib tus nqi tas li, thiab kev sib txhuam coefficient ntawm cov tshuaj tiv thaiv zaj duab xis Nws kuj maj mam nce thiab nyhav rau tus nqi tas li.
5. Thauj khoom
Feem ntau, qhov kev sib txhuam coefficient ntawm cov hlau sib txhuam ntawm cov hlau sib txhuam txo qis nrog qhov nce ntawm qhov load, thiab tom qab ntawd zoo li ruaj khov.Qhov tshwm sim no tuaj yeem piav qhia los ntawm adhesion theory.Thaum lub load me me heev, ob qhov chaw dual yog nyob rau hauv kev sib cuag elastic, thiab qhov chaw sib tiv tiag yog proportional rau 2/3 lub zog ntawm lub load.Raws li txoj kev xav adhesion, kev sib txhuam quab yuam yog proportional rau qhov chaw sib cuag, yog li qhov sib txhuam yog 1 ntawm qhov load./ 3 lub zog yog inversely proportional;Thaum lub load yog loj, ob lub dual qhov chaw yog nyob rau hauv ib tug elastic-yas kev sib cuag lub xeev, thiab lub tiag tiag kev sib cuag cheeb tsam yog proportional rau 2/3 mus rau 1 lub hwj chim ntawm lub load, yog li ntawd qhov kev sib txhuam ntawm kev sib txhuam maj mam txo nrog kev nce ntawm cov load. .nyiam nyob ruaj khov;Thaum lub load yog loj heev uas ob lub dual qhov chaw yog nyob rau hauv kev sib cuag nrog yas, qhov kev sib txhuam qhov tseem ceeb yog tsis muaj kev ywj pheej ntawm load.Qhov loj ntawm qhov kev sib txhuam zoo li qub kuj tseem cuam tshuam rau lub sijhawm ntawm kev sib cuag zoo li qub ntawm ob qhov chaw ob sab hauv qab load.Feem ntau, qhov ntev ntawm kev sib cuag zoo li qub, ntau dua qhov kev sib txhuam zoo li qub.Qhov no yog vim qhov kev txiav txim ntawm qhov load, uas ua rau cov yas deformation ntawm qhov chaw sib cuag.Nrog rau qhov txuas ntxiv ntawm lub sijhawm sib cuag zoo li qub, qhov chaw sib cuag tiag tiag yuav nce ntxiv, thiab cov micro-peaks tau kos rau ib leeg.tshwm sim los ntawm ntxaum.
6. Nto roughness
Nyob rau hauv cov ntaub ntawv ntawm kev sib cuag nrog yas, vim hais tias ntawm tus nto roughness ntawm qhov chaw sib cuag yog me me, nws muaj peev xwm txiav txim siab hais tias qhov kev sib txhuam yam yog tsis tshua muaj cuam tshuam los ntawm cov nto roughness.Rau ib qho kev sib txhuam qhuav nrog elastic lossis elastoplastic tiv tauj, thaum tus nqi ntawm qhov roughness me me, cov nyhuv mechanical me me, thiab lub zog molecular loj;thiab vice versa.Nws tuaj yeem pom tau tias qhov sib txhuam qhov sib txhuam yuav muaj qhov tsawg kawg nkaus nrog kev hloov pauv ntawm qhov roughness
Qhov cuam tshuam ntawm cov yam ntxwv saum toj no ntawm qhov sib txhuam qhov sib txawv tsis yog cais, tab sis cuam tshuam.