Iindaba
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Ukuziphatha kwe-oxidation yeereyili ngexesha lokugaya
2024-12-25
Ngexesha lokusebenzisana phakathi kwee-abrasives kunye neereyile, ukuguqulwa kweplastiki yeereyile kuvelisa ubushushu, kwaye ukungqubana phakathi kwe-abrasives kunye nezixhobo zikaloliwe kuvelisa ubushushu bokugaya. Ukugaya iileyili zetsimbi kuqhutyelwa kwi-atmosphere yendalo, kwaye ngexesha lokugaya, i-steel yensimbi i-oxidized oxidized phantsi kobushushu bokugaya. Kukho ubudlelwane obusondeleyo phakathi kwe-oxidation yomhlaba weentsimbi zentsimbi kunye nokutsha kukaloliwe. Ngoko ke, kuyimfuneko ukufunda ukuziphatha kwe-oxidation yomzila kaloliwe ngexesha lokugaya.
Kuye kwaxelwa ukuba iintlobo ezintathu zamatye okugaya kunye namandla oxinzelelo zilungiselelwe, kunye namandla e-68.90 MPa, 95.2 MPa, kunye ne-122.7 MPa, ngokulandelanayo. Ngokomyalelo wamandla amatye okugaya, i-GS-10, i-GS-12.5, kunye ne-GS-15 isetyenziselwa ukumela la maqela mathathu amatye okugaya. Iisampulu zikaloliwe zensimbi eziphantsi kweeseti ezintathu zamatye okugaya i-GS-10, i-GS-12.5, kunye ne-GS-15, ngokulandelanayo imelwe yi-RGS-10, i-RGS-12.5, kunye ne-RGS-15. Ukuqhuba iimvavanyo zokugaya phantsi kweemeko zokugaya ze-700 N, 600 rpm, kunye nemizuzwana engama-30. Ukuze ufumane iziphumo zovavanyo ezicacileyo, ilitye lokusila likaloliwe lithatha imowudi yoqhagamshelwano yepin disc. Hlalutya indlela yokuziphatha kwe-oxidation yendawo kaloliwe emva kokusila.
I-morphology yomgangatho womzila wensimbi yensimbi yabonwa kwaye yahlalutywa ngokusebenzisa i-SM kunye ne-SEM, njengoko kuboniswe kwi-Fig.1. Iziphumo ze-SM zomphezulu kaloliwe womhlaba zibonisa ukuba njengoko amandla amatye okusila esanda, umbala womgangatho kaloliwe womhlaba uyatshintsha ukusuka eluhlaza okwesibhakabhaka kunye nomdaka omthubi ukuya kumbala wokuqala kaloliwe. Uphononongo olwenziwe nguLin et al. wabonisa ukuba xa ubushushu bokugaya bungaphantsi kwama-471 ℃, umphezulu wesiporo ubonakala ngombala oqhelekileyo. Xa ubushushu bokugaya buphakathi kwe-471-600 ℃, umzila ubonisa ukutsha okutyheli okukhanyayo, ngelixa xa ubushushu bokugaya buphakathi kwe-600-735 ℃, umphezulu wesitimela ubonisa ukutsha okuluhlaza okwesibhakabhaka. Ke ngoko, ngokusekwe kutshintsho lombala womgangatho kaloliwe womhlaba, kunokuchazwa ukuba njengoko amandla elitye lokusila ehla, ubushushu bokugaya bukhula ngokuthe ngcembe kwaye inqanaba lokutshisa likaloliwe liyanda. I-EDS yayisetyenziselwa ukuhlalutya ukubunjwa kwe-elemental yomgangatho wesitimela wentsimbi yomhlaba kunye nomphezulu wenkunkuma. Iziphumo zabonisa ukuba ngokunyuka kwamandla amatye okusila, umxholo we-O element kumphezulu womzila kaloliwe wehla, ebonisa ukuncipha kokubophelela kwe-Fe kunye ne-O kumphezulu womzila kaloliwe, kunye nokuncipha kweqondo le-oxidation kaloliwe, ehambelana nomkhwa wokutshintsha kombala kumphezulu wesitimela. Kwangaxeshanye, umxholo we-O element kumphezulu ophantsi we-debris yokusila nayo iyancipha ngokunyuka kwamandla amatye okusila. Kuyafaneleka ukuba uqaphele ukuba kumphezulu womhlaba wentsimbi yensimbi ngelitye elifanayo lokugaya kunye nomgangatho ophantsi we-debris yokusila, umxholo we-O element kwi-surface yokugqibela iphezulu kuneyokuqala. Ngethuba lokubunjwa kwe-debris, i-deformation yeplastiki iyenzeka kwaye ubushushu buveliswa ngenxa yokunyanzeliswa kwe-abrasives; Ngethuba lenkqubo yokuphuma kwe-debris, umgangatho ophantsi we-debris uhlahlela kwindawo yangaphambili ye-abrasive kwaye uvelise ubushushu. Ngoko ke, umphumo odibeneyo wokuguqulwa kwe-debris kunye nobushushu obunzima bukhokelela kwiqondo eliphezulu le-oxidation kumphezulu ophantsi we-debris, obangela umxholo ophezulu we-O element.
(a) Amandla aphantsi okusila amatye aphantsi komhlaba kaloliwe wentsimbi (RGS-10)
(b) Umphezulu womhlaba kaloliwe wentsimbi kunye nelitye lokusila elinamandla aphakathi (RGS-12.5)
(c) Amandla aphezulu okusila amatye aphantsi komhlaba kaloliwe wentsimbi (RGS-15)
Umzobo 1. I-Surface morphology, i-debris morphology, kunye nohlalutyo lwe-EDS lweentsimbi zentsimbi emva kokugaya ngamandla ahlukeneyo amatye okusila.
Ukuze kuphandwe ngakumbi ngeemveliso ze-oxidation kumphezulu weentsimbi zentsimbi kunye nokwahluka kweemveliso ze-oxidation kunye neqondo lokutshiswa komphezulu kaloliwe, i-X-ray photoelectron spectroscopy (XPS) yasetyenziswa ukufumanisa imeko yeekhemikhali zezinto ezikumaleko okufutshane womgangatho wentsimbi yomhlaba. Iziphumo ziboniswe kwiFig.2. Uhlalutyo olupheleleyo lweziphumo zomphezulu kaloliwe emva kokugaya ngamandla ahlukeneyo amatye okusila (Umfanekiso 2 (a)) ubonisa ukuba kukho iC1s, i-O1s, kunye neencopho ze-Fe2p kumphezulu womzila kaloliwe, kwaye ipesenti ye-O athomu iyancipha kunye neqondo lokutshisa kwindawo kaloliwe, ehambelana nomzekelo weziphumo zohlalutyo lwe-EDS. Ngenxa yokuba i-XPS ibona i-elemental state kufuphi ne-face layer (malunga ne-5 nm) yezinto eziphathekayo, kukho ukungafani okuthile kwiindidi kunye neziqulatho zezinto ezifunyenwe yi-XPS ye-spectrum epheleleyo xa kuthelekiswa ne-substrate kaloliwe yensimbi. Incopho ye-C1s (284.6 eV) isetyenziswa ikakhulu ukulinganisa amandla okubopha amanye amalungu. Imveliso ephambili ye-oxidation ebusweni beentsimbi zensimbi yi-Fe oxide, ngoko ke i-spectrum encinci ye-Fe2p ihlalutywa ngokweenkcukacha. Umzobo we-2 (b) ukuya (d) ubonise uhlalutyo oluncinci lwe-spectrum ye-Fe2p ebusweni beentsimbi zensimbi i-RGS-10, i-RGS-12.5, kunye ne-RGS-15, ngokulandelanayo. Iziphumo zibonisa ukuba kukho iincopho ezimbini zamandla ezibophelelayo kwi-710.1 eV kunye ne-712.4 eV, echazwe kwi-Fe2p3 / 2; Kukho iincopho zamandla ezibophayo ze-Fe2p1/2 kwi-723.7 eV kunye ne-726.1 eV. Incopho yesathelayithi ye-Fe2p3/2 iku-718.2 eV. Iincopho ezimbini ze-710.1 eV kunye ne-723.7 eV zinokuthi zifakwe kumandla okubopha i-Fe-O kwi-Fe2O3, ngelixa ii-peaks ze-712.4 eV kunye ne-726.1 eV zinokuthi zifakwe kumandla okubopha i-Fe-O kwi-FeO. Iziphumo zibonisa ukuba Fe3O4 Fe2O3. Okwangoku, akukho ncopho yohlalutyo ifunyenwe kwi-706.8 eV, ebonisa ukungabikho kwe-elemental Fe kumzila wesitimela ophantsi.
(a) Uhlalutyo olupheleleyo
(b) RGS-10 (bhlowu)
(c) RGS-12.5 (mthubi okhanyayo)
(d) RGS-15 (umbala wokuqala wentsimbi kaloliwe)
Isazobe.2. Uhlalutyo lwe-XPS lwemigangatho kaloliwe enemigangatho eyahlukeneyo yokutsha
Ipesenteji yendawo ephakamileyo kwi-spectrum ye-Fe2p ibonisa ukuba ukusuka kwi-RGS-10, i-RGS-12.5 ukuya kwi-RGS-15, ipesenti yendawo ephakamileyo ye-Fe2 + 2p3 / 2 kunye ne-Fe2 + 2p1 / 2 ukwanda, ngelixa i-peak area ipesenti ye-Fe3 + 2p3 / 2 kunye ne-Fe3 + 2p1 / 2 iyancipha. Oku kubonisa ukuba njengoko iqondo lokutshiswa komphezulu kumzila wesitimela liyancipha, umxholo we-Fe2 + kwiimveliso ze-oxidation ze-surface zanda, ngelixa i-Fe3 + umxholo wehla. Amacandelo ahlukeneyo emveliso ye-oxidation ibangela imibala eyahlukeneyo yomzila womhlaba. Iqondo eliphezulu lokutshisa umphezulu (oluhlaza okwesibhakabhaka), iphezulu umxholo weemveliso ze-Fe2O3 kwi-oxide; Iqondo elisezantsi lokutsha komphezulu, kokukhona umxholo weemveliso ze-FeO uphezulu.