Inkinga Ebalulekile Yokunciphisa Iziciqinini Ngemuva KokuBhinda Kwizintshukumelelo ZeDiamond

Iziciqinini zomoya, izimboni ze-metal, ne-slurry yokugaya: njani iziciqinini ezingaphezu kuka-5µm zihlukanisa ubunzima bomdaka

Inqubo yokushisela iletha zonke izinhlobo ezingcolisayo ezincane njengensalela ye-flux, ama-oxide ensimbi, nezinhlayiya ze-slurry yokugaya ezibambeka ekujuleni kwemivimbo nezimbobo ngemva kokuba izingxenye zihlanganisiwe. Lezi zinhlayiya ezincane zivame ukuba ngaphansi kuka-5 microns ngosayizi, futhi zigcina zenza izindawo ezibuthakathaka lapho amadayimane ehlangana khona ne-metal matrix. Ucwaningo olwenziwayo lokuthi izinto zinamathela kanjani ndawonye lubonisa ukuthi lokhu kunganciphisa amandla okubopha noma kuphi kusuka ku-30 kuya ku-40%, nakuba imiphumela ihluka kuye ngezimo. Kwenzekani ngokulandelayo? Lapho ukucindezeleka okusebenzayo kuqala ukusabalala kulezo zindawo ezingcolile, amadayimane ayawa ngokuphelele. Amasu ajwayelekile okusula awasebenzi ekuqedeni izinto ezingcwatshwe ngaphansi kwamapulangwe ngezimo eziyinkimbinkimbi ezihlanganisiwe. Futhi ukusebenzisa izixazululo kuvame ukushiya amafilimu amancane empeleni aphazamise imisebenzi yokushisela kamuva noma ezinye izinqubo zokuhlanganisa phansi komugqa.

Imiphumela iyalinganiswa futhi iyasebenza:

• Ukudonswa kwe-diamond ngaphambi kwesikhathi ngesikhathi sokusika noma sokugaya
• Ukwehliswa kokuqhuba ukushisa kuma-interface abalulekile e-diamond-matrix
• Ukugqokwa kwe-matrix okusheshayo okuzungeze izibopho eziphikisiwe

Lapho ukungcola kwezinhlayiya kwehla ngaphansi kwama-microns angu-10, izingxenye zedayimane zibonisa ukugcinwa kwamandla okudonsa okuncane cishe ngama-30% uma kuqhathaniswa namamodeli ahlanzekile. Lokhu kubaluleke kakhulu emishini ebizayo njengama-polycrystalline diamond drill bits noma imidwebo yocingo ngoba ngisho nokungcola okuncane kuholela ekuwohlokeni okungalindelekile ngesikhathi sokusebenza futhi kudinga ukulungiswa okubizayo emgqeni. Ukuhlanza kahle ngemva kokusebenza kokushisela akuseyona nje into enhle, sekubaluleke kakhulu ekunqumeni ukuthi lezi zinsimbi zizohlala isikhathi esingakanani ngaphambi kokuba zidinge ukushintshwa. Ukuvumelana kokunqunywa kuyaqhubeka kuphazamiseka uma kungenjalo, kuthinta ikhwalithi yokukhiqiza ezindaweni ezahlukahlukene zokukhiqiza kusukela ekukhiqizeni izingxenye zezimoto kuya ezimbonini ezicubungula izinsimbi ngokunemba.

Indlela Ukuhlanza Nge-Ultrasonic Okuyiqondisa Ngayo Ngokunembile Ukungcola Okungatheni

I-cavitation physics: ukwakheka kwe-microjet nokulethwa kwamandla endaweni ethile kuma-interface e-diamond-matrix

Ukuhlanza nge-ultrasonic kusebenza ngokusebenzisa lawo magagasi omsindo anemvamisa ephakeme ngempela, ngokuvamile aphakathi kuka-20 no-40 kHz, akha amabhamuza amancane amancane ezixazululweni zokuhlanza ezikhethekile ezisekelwe emanzini noma ezisekelwe emanzini. Lapho la mabhamuza ephuma eduze kwamapulangwe angcolile, empeleni akha amajethi amancane emandla angashaya izindawo ezinengcindezi engaphezu kuka-10,000 psi lapho amadayimane ahlangana khona nezinto zawo eziyinhloko. Yonke le nqubo isusa ngokuqondile izinhlayiya ezincane kune-5 microns ebusweni. Cabanga ngezinto ezinjengokukhishwa kwezinto ezisele noma ama-oxide ensimbi ahlanzwa ngaphandle kokulimaza ukwakheka kwedayimane noma ukuphuca noma yikuphi ukuxhumana kwensimbi. Lokhu kwenza kube nokwenzeka ukuhlanza izinto ezibucayi kakhulu ngaphandle kokulimaza ngesikhathi senqubo.

Izindlela zamakhemikhali zodwa azikwazi ukufinyelela kulezo zindawo ezinzima njengama-blind hole noma ama-undercuts ezingxenyeni ezinemiklamo eyinkimbinkimbi. Ukwakheka kwe-cavitation kusebenza ngendlela ehlukile ngokufinyelela kulezi zindawo okunzima ukufinyelela kuzo lapho izinsalela zivame ukunamathela khona isikhathi eside. Ukuhlolwa okwenziwa amalebhu agunyazwe izindinganiso ze-ISO/IEC 17025 kubonisa ukuthi ukuhlanza nge - ultrasonic kususa cishe amaphesenti angu-98 kuya kwangu-99 ezingcolisi ezimweni eziyinkimbinkimbi. Lokhu kwenza ukuhlanza nge-ultrasonic kugqame njengendlela engcono kakhulu yokufinyelela kulezozikhala ezincane phakathi kwamapulangwe lapho izinto ezisele zokushisela zingase zikwenze buthaka ngempela ukuqina kwengxenye.

Kungani izindlela ezivamile (ukuhlikihla, ukucwilisa izixazululo, ukuhlanza umusi) zingaphumeleli kuma-geometry ayinkimbinkimbi nasezihlanganisweni ezihlanganisiwe

Izindlela zokuhlanza zendabuko azisebenzi lapho kusetshenziswa amathuluzi edayimane. Ngokwesibonelo, ukuxubha ngesandla akukwazi ukufinyelela kulezo ziteshi zangaphakathi ezitholakala emathulini ahlukanisiwe futhi kunengozi yokudonsa amadayimane ayigugu ngesikhathi senqubo. Kuthiwani ngokumunca uketshezi? Ake sibhekane nakho, le ndlela ayenzi amandla anele okuhlanza lokho kugaya okuqinile okubambeke ngaphakathi kwamabhande anezikhala. Ucwaningo lubonisa ukuthi cishe amaphesenti angu-40 ezingcolisi asahlala kulezo zimbobo ezincane ngemva kokwelashwa. Ukususwa kwamafutha ngomphunga kuletha enye inselele. Kuvame ukushiya lezo zinhlayiya ezicasulayo ze-oxide eziphansi ezintweni ezizwela ukushisa, futhi kusebenza kabi lapho kusetshenziswa izimbobo ezingaboni. Futhi nakhu okuthakazelisayo, ayikho kulezi zindlela ezivamile enikeza amandla aqondisiwe, akhethekile adingekayo ukuze kususwe lezo zingcolisi ezincane ezindaweni ezinomsindo noma ezingalingani. Kunalokho, lokho okwenzekayo ukuthi izinhlayiya ziyaxoshwa esikhundleni sokususwa kahle, okuqeda injongo yokuhlanza kwasekuqaleni.

Ekukhiqizeni amathuluzi edayimane adinga ukuqinisekiswa kwekhwalithi ye-weld, i-ultrasonic cavitation kuphela enikeza ukunemba kwendawo namandla adingekayo ukugcina izinga lokungcola komhlaba lingaphansi kwamazinga wokwehluleka abalulekile.

Ukuqinisekiswa kokuhlanzwa kwe-ultrasonic kwamathuluzi edayimane anenani eliphakeme

Ukuqinisekiswa okungonakalisi: ukuhlolwa kokugcinwa kokuqina kokuqina nokuqina kobuso (izivumelwano ezihambisana ne-ISO 13485)

Ukuze sihlole ukuthi ukuhlanza nge - ultrasonic kuyasebenza yini, sidinga izindlela ezingoni izingxenye kodwa zibonise ukuthi zisebenza kahle. Izindinganiso ezilandela i-ISO 13485 ngokuvamile zihlanganisa ukuhlolwa kokuqina kokuqina ukuze kuqinisekiswe ukuthi lezo zixhumanisi zedayimane-matrix zigcina okungenani u-95% wamandla azo okuqala ngemuva kokuhlanzwa. Ukuhlola ukuthi lezi zingxenye zinamathela kahle kangakanani kulinganisa ukuthi amadayimane ahlala yini lapho ebhekene namandla afana nalawo abakhona lapho esebenza. Lokhu kusiza ekuqinisekiseni ukuthi ukususa ukungcola okufana ne-flux nama-oxide empeleni akubuthakathakisi ubuhlobo phakathi kwezinto, okubalulekile ekugcineni ikhwalithi yomkhiqizo ngokuhamba kwesikhathi.

Idatha ebuyekezwe yizazi I-Journal of Materials Processing Technology (Ijenali Yokusebenza Kwezobuchwepheshe Bokusebenzisa Izinto) (2024) ikhombisa ukugcinwa kokuqina okungu-99.2% kumathuluzi ahlanzwe nge-ultrasonic uma kuqhathaniswa no-84% kumathuluzi okulawula aphathwe nge-solvent-okubonisa ukuthi izinqubo ze-ultrasonic eziqinisekisiwe zigcina ukuthembeka kwesakhiwo ngaphandle kokuphazamisa izisekelo ezinenani eliphakeme.

Imingcele yokuthola imfucuza kusetshenziswa i-XRF ne-SEM-EDS − ukuchaza imigomo yokugunyaza/yokungavunyelwe yokukhululwa ekukhiqizeni

Ukuqinisekiswa kokugcina kokuhlanza kusekelwe ku-X-ray Fluorescence (XRF) ne-Scanning Electron Microscopy ene-Energy Dispersive Spectroscopy (SEM-EDS). I-XRF ithola izinsalela zensimbi ezinamandla > 0.1% ingxenye ye-mass phezu kobuso obubanzi, kuyilapho i-SEM-EDS imepha ukusabalalisa kwezinto ezinokucaca okuncane - ikakhulukazi ezindaweni eziphakathi kwensimbi yedayimane lapho kugxila khona i-slurry yokugaya noma i-iron oxides.

Ukuze kutholakale izinhlayiya, kumele amabhengezeli abeke imitholoko ema-gram 50 ngasorting yamathuba ngekati yesikhathi, kodwa le mahluko isusa kuma-gram 5 ngasorting yamathuba ngekati xa kusekelwa kumalayizi wokugcina okwemedical noma kwezinkinga eziphephile kakhulu. Ukulandela lezi zimo ngesikhathi sekwakhiwa kusungula ukuthintana kwezixhobo ngoba kunezinkinga ezifinyelela phakathi kwemfazwe yokudonsa. Lokhu kukhuni okwesivumelwano akukho mthetho wezimali kumabhengezeli abayakha iziqinisekiso zezindlela, izikrapi zokuphatha izinkumbulo, noma izixhobo zemedical. Umqondo wokwenza lokhu akuvunyelwa uma imizimba nezinhlelo eziningi zidependent kuqhathaniswa nokusebenza okuphelele.

Ukulungisa Izigaba Zokucwashulwa Ngokwesono Kuthathe Imbala Yediamond

Ukulinganisa kahle kwemiparamitha yokucwasa nge-ultrasonic kuyisidingo ekuthinteni izizathu ezingaphansi kwe-micron ngelokhu kugcina ubunzima be-diamond−matrix bond. Kufuneka kube yilandelana imivari-efrekhenzi (25−130 kHz), umkhawulo wamandla (W/L), ikhemikhali yesayensi, ubude bezinsuku (50−65°C), nokude kwegama lokujikeleza ukuze kuthuthukise inhlaka yekavithitheshini ngaphandle kokuthi kwenze isifo esincane esiphakeme.

Izifrekhenzi ezide (40−130 kHz) zenza i-bubbles ezincane kakhulu neziningi kahle ukufinyelela emigangathweni yomshanelo opholile kanye nematrikhesi enezimboni ezincane. Izifrekhenzi ezincane (25−40 kHz) zinikeza izimplosion ezinezimali eziphakeme kahle kumaflux residues. Ukulawula kwebala kuthuthukisa indimba yesayensi ngaphandle kwebabaqwa, kanti ne-formulations ezingaphansi kwe-pH zivikela ukucindezelwa kwe-matrix noma ukuguquka kwe-diamond ku-graphite.

Ukuthembeka ngaphakathi kuka SEM-EDS kuthembisa ukususwa kwezindlela ezincane kusuka kumkhombandlela ophansi kuka 0.1%, ngelokho ukuchazwa okuphambene kuvikela ubunzima bokudansela obugcwele kakhulu kunezimali ekuqaleni. Lokhu kumele kuhlanganise ukucindezelwa okujwayelekileyo nokuphila kwesivimba esidingekayo ukuze kuqhutshelwe imfanelo yezixhumanisi zediamond kuzintu ezinezindlela eziphambene.

Imibuzo Evame Ukubuzwa

Kungani ukucwashwa ngokulungelelanisa kufunyanwa kunemithetho engenhla?

Ukucwashwa ngokulungelelanisa kufunyanwa ngoba kufinyelela emaphandleni amadala, aphansi kwezindlu ezingafinyelelwa ngemithetho engenhla njengekushaya noma ukubuyisa ngosolwazi. Indlela yakhe yokulungelelanisa ihlanza izinto eziphazanyayo ngaphandle kokwenza isifo kumzimba ongashiyanga.

Ukucwashwa ngokulungelelanisa kuhlinzela kanjani ubunzima be-diamond-matrix?

Ukucwashwa ngokulungelelanisa usebenzisa izinkondlo zomthwalo osobala ukuze kwenze izikhumba ezisusa izinkinga ngaphandle kokubeka ingozi enkulu. Lokhu kuhlenga isakhiwo se-diamond nezixhumanisi zemetals zizime, kuhlenga ubunzima bokuxhumanisa.

Iziphi izici ezibalulekileyo kumsebenzi onempilo wesilwa ngendlela esingekayo?

Ukusebenza kwesilwa ngendlela esingekayo kusuke kuhlaziywa ngokucophelela ukukhanya, umthubi wamandla, imithi yentsimbi, ubude bezinsuku, nokugcina okuphelele ukuqinisekisa ukususwa kwezici ezingekayo ngaphandle kokwenza isimo esiphazanyayo.