1. Ukukhiqizwa kwedayimane eline-carbide
Umgomo wokuxuba i-powder yensimbi nedayimane, ukufudumeza ekushiseni okungaguquki kanye nokufakwa kwe-insulation isikhathi esithile ngaphansi kwe-vacuum. Kuleli zinga lokushisa, umfutho we-vapor wensimbi wanele ukumboza, futhi ngesikhathi esifanayo, insimbi iyakhangiswa endaweni yedayimane ukuze yakhe idayimane eliboshwe.
2. Ukukhethwa kwensimbi eboshwe
Ukuze wenze ukugqoka kwedayimane kuqine futhi kuthembekile, futhi uqonde kangcono ithonya lokubunjwa kokugqoka emandleni okugcoba, insimbi yokugqoka kufanele ikhethwe. Siyazi ukuthi idayimane i-alloomorphism ka-C, futhi i-lattice yayo iyi-tetrahedron evamile, ngakho-ke isimiso sokumboza ukwakheka kwensimbi ukuthi insimbi inobudlelwane obuhle bekhabhoni. Ngale ndlela, ngaphansi kwezimo ezithile, ukusebenzisana kwamakhemikhali kwenzeka esibonakalayo, kwakha isibopho samakhemikhali esiqinile, futhi i-membrane ye-Me-C yakheka. I-infiltration and adhesion theory ohlelweni lwe-diamond-metal ibonisa ukuthi ukusebenzisana kwamakhemikhali kwenzeka kuphela lapho ukunamathela kusebenza AW> 0 futhi kufinyelela inani elithile. Izakhi zensimbi zeqembu B ezimfushane kuthebula le-periodic, njenge-Cu, Sn, Ag, Zn, Ge, njll. zinokusondelana okungekuhle ku-C nomsebenzi wokunamathela ophansi, futhi amabhondi akhiwe ayizibopho zamangqamuzana angaqinile futhi akufanele akhethwe; izinsimbi zenguquko kuthebula le-periodic ende, njenge-Ti, V, Cr, Mn, Fe, njll., zinomsebenzi omkhulu wokunamathisela nesistimu ye-C. Amandla okuxhumana ka-C nezinsimbi zokushintsha akhuphuka ngenani lama-electron angu-d layer, ngakho i-Ti ne-Cr zifaneleka kakhulu ukumboza izinsimbi.
3. Ukuhlolwa kwesibani
Emazingeni okushisa angama-8500C, idayimane alikwazi ukufinyelela amandla amahhala ama-athomu ekhabhoni acushiwe endaweni yedayimane kanye nempushana yensimbi ukwenza i-carbide yensimbi, futhi okungenani i-9000C ukuze kuzuzwe amandla adingekayo ukuze kwakhiwe i-carbide yensimbi. Kodwa-ke, uma izinga lokushisa liphezulu kakhulu, lizokhiqiza ukulahlekelwa okushisayo kwedayimane. Uma kucatshangelwa umthelela wephutha lokulinganisa izinga lokushisa nezinye izici, izinga lokushisa lokuhlola ukunamathela libekwe ku-9500C. Njengoba kungabonakala ebuhlotsheni obuphakathi kwesikhathi sokufakelwa kanye nesivinini sokuphendula (ngezansi),? Ngemva kokufinyelela amandla amahhala esizukulwane se-carbide yensimbi, ukusabela kuqhubeka ngokushesha, futhi ngokukhiqizwa kwe-carbide, izinga lokuphendula lizohamba kancane kancane. Akungabazeki ukuthi ngokunwetshwa kwesikhathi se-insulation, ukuminyana kanye nekhwalithi yesendlalelo kuzothuthukiswa, kodwa ngemva kwemizuzu engama-60, izinga lesendlalelo alithinteki kakhulu, ngakho-ke sibeka isikhathi sokufaka njengehora elingu-1; uma i-vacuum iphakeme, iba ngcono, kodwa ilinganiselwe ezimweni zokuhlola, ngokuvamile sisebenzisa u-10-3mmHg.
Umgomo wokuthuthukisa ikhono lesethi yephakheji
Imiphumela yokuhlolwa ibonisa ukuthi umzimba wengane unamandla kunedayimane elimboziwe kunedayimane elingagcotshiwe. Isizathu sekhono eliqinile lokufakwa komzimba wengane edayimaneni elimboziwe ukuthi, mathupha, kukhona ukukhubazeka okungaphezulu kanye nokuqhekeka okuncane ebusweni noma ngaphakathi kwanoma yiliphi idayimane lokwenziwa elingagcotshiwe. Ngenxa yokuba khona kwala ma-microcracks, amandla edayimane ayancipha, ngakolunye uhlangothi, isici esingu-C sedayimane asivamile ukusabela nezingxenye zomzimba wengane. Ngakho-ke, umzimba wamasondo wedayimane elingagcotshiwe liyiphakheji nje lomshini wokukhipha, futhi lolu hlobo lokufakwa kwephakheji lubuthaka ngokwedlulele. Uma sekulayishiwe, ama-microcracks angenhla azoholela ekugxilweni kwengcindezi, okuholela ekwehleni kwekhono lokufaka iphakheji. Icala ledayimane elithwala ngokweqile lihlukile, ngenxa yokucwecwa kwefilimu yensimbi, amaphutha e-diamond lattice kanye nemifantu emincane agcwaliswa, ngakolunye uhlangothi, amandla edayimane eliboshwe ayanda, ngakolunye uhlangothi, agcwele imifantu emincane, ayisekho into yokuhlushwa ukucindezeleka. Okubaluleke nakakhulu, ukungena kwensimbi eboshiwe emzimbeni wesondo kuguqulwa kube ikhabhoni endaweni yedayimaneUkungena kwezinhlanganisela. Umphumela uba insimbi ebophayo ku-engeli yokumanzisa idayimane isuka ngaphezu kuka-100 o iye ngaphansi kuka-500, ithuthukise kakhulu insimbi yokubopha yokumanzisa idayimane, yenze umzimba wesondo lephakeji ledayimane elisimbozayo limiswe iphakethe lomshini wokukhipha idayimane libe yiphakeji yokubopha, okuyisibopho somzimba wedayimane elimbozayo, ngaleyo ndlela ithuthukise kakhulu umzimba wengane.
Ikhono lokufaka iphakheji. Ngesikhathi esifanayo, sikholelwa futhi ukuthi ezinye izici ezifana nemingcele ye-sintering, usayizi wezinhlayiyana zedayimane ezimboziwe, ibanga, usayizi wezinhlayiyana ze-fetus nokunye kunomthelela othile kumandla okufaka iphakheji. Ukucindezela okufanele kwe-sintering kungakhuphula ukuminyana kokucindezela futhi kuthuthukise ubulukhuni bomzimba wengane. Izinga lokushisa elifanelekile le-sintering kanye nesikhathi sokufaka kungakhuthaza ukusabela kwamakhemikhali okushisa okuphezulu kokwakheka komzimba wesondo kanye nensimbi eboshiwe nedayimane, ukuze iphakethe lebhondi limiswe ngokuqinile, ibanga ledayimane lihle, ukwakheka kwekristalu kuyafana, isigaba esifanayo siyancibilika, futhi isethi yephakheji ingcono.
Ingcaphuno evela ku-Liu Xiaohui
Isikhathi sokuthumela: Mar-13-2025
