1. Ukuveliswa kwedayimani efakwe kwi-carbide
Umgaqo wokuxuba i-powder yensimbi kunye nedayimane, ukufudumeza kwiqondo lokushisa elingaguqukiyo kunye ne-insulation ixesha elithile phantsi kwe-vacuum. Kulo bushushu, uxinzelelo lomphunga lwesinyithi lwanele ukugquma, kwaye kwangaxeshanye, isinyithi sibhengezwa kumphezulu wedayimani ukwenza idayimane egqunyiweyo.
2. Ukukhethwa kwesinyithi esicatyisiweyo
Ukuze wenze i-diamond ye-diamond iqine kwaye inokwethenjelwa, kwaye uqonde kakuhle impembelelo yokubunjwa kwe-coating kumandla okugcoba, kufuneka kukhethwe isinyithi sentsimbi. Siyazi ukuba idayimane i-alloomorphism ye-C, kwaye i-lattice yi-tetrahedron eqhelekileyo, ngoko ke umgaqo wokugquma ukubunjwa kwesinyithi kukuba isinyithi sinobudlelwane obuhle bekhabhoni. Ngale ndlela, phantsi kweemeko ezithile, ukusebenzisana kweekhemikhali kwenzeka kwi-interface, okwenza i-chemical bond eqinile, kwaye i-membrane ye-Me-C yenziwe. I-infiltration kunye ne-adhesion theory kwinkqubo ye-diamond-metal ibonisa ukuba ukusebenzisana kweekhemikhali kwenzeka kuphela xa umsebenzi wokubambelela AW> 0 kwaye ufikelela kwixabiso elithile. Iqela elifutshane leqela le-B metal elements kwi-periodic table, njenge-Cu, i-Sn, i-Ag, i-Zn, i-Ge, njl.njl inobudlelwane obuhlwempuzekileyo be-C kunye nomsebenzi wokubambelela ophantsi, kwaye iibhondi ezenziwe ngamabhondi e-molecular aqinile kwaye akufanele akhethwe; iintsimbi zenguqu kwitafile ye periodic ende, ezifana ne-Ti, V, Cr, Mn, Fe, njl., zinomsebenzi omkhulu wokubambelela kunye nenkqubo ye-C. Amandla okunxibelelana kwe-C kunye neentsimbi zenguqu ayanda ngenani le-electron d layer, ngoko i-Ti kunye ne-Cr zifanelekile ngakumbi ukugubungela isinyithi.
3. Uvavanyo lwesibane
Kwiqondo lobushushu le-8500C, idayimane ayinakufikelela kumandla asimahla e-athomu yekhabhoni esebenzayo kumphezulu wedayimani kunye nomgubo wesinyithi ukwenza i-carbide yesinyithi, kwaye ubuncinci be-9000C ukufezekisa amandla afunekayo ukuze kuqulunqwe i-carbide yensimbi. Nangona kunjalo, ukuba iqondo lokushisa liphezulu kakhulu, liya kuvelisa ilahleko yokutshisa i-thermal kwidayimani. Ukuqwalasela impembelelo yempazamo yokulinganisa ubushushu kunye nezinye izinto, ubushushu bovavanyo lokugquma bubekwe kwi-9500C. Njengoko kunokubonwa kubudlelwane phakathi kwexesha lokugquma kunye nesantya sokusabela (ngezantsi),? Emva kokufikelela kumandla asimahla esizukulwana se-carbide yensimbi, ukusabela kuqhubeka ngokukhawuleza, kwaye kunye nesizukulwana se-carbide, isantya sokuphendula siya kuthi chu kancinci. Akungabazeki ukuba kunye nokwandiswa kwexesha le-insulation, ubuninzi kunye nomgangatho woluhlu luya kuphuculwa, kodwa emva kwemizuzu engama-60, umgangatho woluhlu awuchaphazeleki kakhulu, ngoko sibeka ixesha lokumisa njengeyure eli-1; iphezulu i-vacuum, ingcono, kodwa ilinganiselwe kwiimeko zovavanyo, sisebenzisa ngokubanzi i-10-3mmHg.
Umgaqo-siseko wokuphucula isakhono sepakethi
Iziphumo zovavanyo zibonisa ukuba umzimba womntwana unamandla kwidayimani eqatywe kunedayimani engagqunywanga. Isizathu sesakhono esinamandla sokubandakanywa komzimba wosana olungekazalwa kwidayimane egqunywe yidayimani kukuba, buqu, kukho iziphene ezingaphezulu kunye nokuqhekeka kwe-micro-umphezulu okanye ngaphakathi kuyo nayiphi na idayimani eyenziweyo engagqunywanga. Ngenxa yobukho bezi microcracks, amandla edayimani ayancipha, kwelinye icala, i-C element yedayimani ayifane iphendule kunye namalungu omzimba womntwana. Ke ngoko, umzimba wetayara wedayimani engagqunywanga yipakethe yokufakelwa komatshini, kwaye olu hlobo lokufaka ipakethe lubuthathaka kakhulu. Nje ukuba umthwalo, i-microcracks ingentla iya kukhokelela ekugxininiseni uxinzelelo, okukhokelela ekwehleni kwesakhono sokufaka iphakheji. Icala ledayimani eligqithisiweyo lihlukile, ngenxa yokubethelwa kwefilimu yesinyithi, i-diamond lattice defects kunye ne-micro cracks zizaliswe, kwelinye icala, amandla edayimane egqunyiweyo ayanda, kwelinye icala, azaliswe ngokuqhekeka kwe-micro, akusekho i-concentration phenomenon yoxinzelelo. Okubaluleke ngakumbi, ukungeniswa kwesinyithi esidityanisiweyo kumzimba wetayara kuguqulwa kwikhabhoni kumphezulu wedayimaniUkungena kweekhompawundi. Iziphumo yintsimbi ebophelelayo kwi-engile yokumanzisa idayimani ukusuka ngaphezulu kwe-100 ukuya ngaphantsi kwe-500, iphucule kakhulu isinyithi esibophelelayo sokumanzisa idayimani, yenza umzimba wetayara lepakethe yedayimani egqunyiweyo esetelwe yipakethe yomatshini yedayimani yoqobo kwiphakheji yokubopha, eyile idayimani egqumayo kunye neqhina lomzimba wetayara, ngaloo ndlela iphucula kakhulu umzimba wosana.
Isakhono sokufaka ipakethe. Kwangaxeshanye, sikwakholelwa ukuba ezinye izinto ezinje ngeeparamitha ze-sintering, ubungakanani besuntswana ledayimane eligqunyiweyo, ibakala, ubungakanani bomzimba womntwana ongekazalwa kunye nokunye kunempembelelo ethile kumandla okufaka iphakheji. Uxinzelelo olufanelekileyo lwe-sintering lunokunyusa ubuninzi boxinzelelo kunye nokuphucula ukuqina komzimba womntwana. Ubushushu obufanelekileyo be-sintering kunye nexesha lokugquma linokukhuthaza ubushushu obuphezulu bekhemikhali yokusabela kokwakheka komzimba wetayara kunye nentsimbi egqunyiweyo kunye nedayimane, ukuze iphakheji yebhondi imiselwe ngokuqinileyo, ibakala ledayimani lilungile, ubume bekristale bufana, isigaba esifanayo siyanyibilika, kwaye iseti yephakheji ingcono.
Isicatshulwa esivela kuLiu Xiaohui
Ixesha lokuposa: Mar-13-2025
