Indima Ebalulekile Yokulahlekelwa Kwezinkane Kukusebenza Kwesincane Sincane

Ukukhula Kwezinkane Nokulahlekwa Kwezinkane Kuzincane Ezisindisiwe zezincane

Ukushisa ngokweqile ngesikhathi sokusika kusheshisa ukugqwala kweblade ngokusebenzisa ukuthamba kwe-matrix kanye ne-diamond graphitization. Ezimbanjeni ezenziwe ngethusi, amazinga okushisa angaphezu kuka-700°C anciphisa ubulukhuni be-matrix, okuholela ekulahlekelweni kwedayimane ngaphambi kwesikhathi. Ngesikhathi esifanayo, amadayimane aqala ukuguqulwa abe i-graphite, okubangela ukwehla kokusebenza kahle kokusika kuze kufike ku-40% ekusebenzeni okuqhubekayo.

Okwenza Ukushisa Okuphumelelayo Kukhuthaze Ukuphila Kwekhaba Nokucutha

Ama-blade anokuqhuba ukushisa okuphezulu agcina imiphetho yokusika esebenzayo izikhathi ezingu-23 isikhathi eside ngokunciphisa ukushisa. Ukushiswa okusheshayo okuvela endaweni yokusika kuvimbela ukuqhuma okuncane ezindaweni eziphakathi kwedayimane nensimbi, ukufakwa kwe-oxidation kwezinto ezihlanganisiwe, nokuqhekeka kwedayimane okubangelwa ukucindezeleka okubangelwa amazinga okwanda okushisa angafani.

Isifundo Secala: Ukwehluleka Okushisayo Kwezibopho Ezishisayo Ezishaywa Ngethusi

Ukuhlaziywa kwama-blade asezingeni lokwakha okwenziwa ngo-2023 kwatholakala ukuthi amaphesenti angu-68 amathuluzi aboshwe ngethusi aba nemivimbo emibi eduze kwamajoyini ezingxenye ngemva kwemizuzu engu-90 yokusika igranite ngokuqhubekayo. Ukuthwebula izithombe ezishisayo kwaveza amazinga okushisa endawo afinyelela ku-850°C550°C aphakeme kunama-cobalt-based equivalent ngaphansi kwezimo ezifanayookugcizelela isidingo esibucayi sokuphathwa kokushisa okuthuthukisiwe.

Isidingo Esikhulayo Somkhakha Wezinto Ezihlanganisiwe Ezishisa Kakhulu

Lamuhla, abasebenzi bayaphakama kakhulu kumade kuqinisekisa ukuthi izixwayiso zokudansela kwesibindi ziyancanisa kangaka 200 W/m·K, bavuka kumcombo wokwenzeka okudala wekopi-nikeli. Bayashintsha endleleni eya kumade masha njengeembono ezizinzile ze-tungsten carbide econdenselwe kumatriki we-cobalt chromium. Kungani? Ngoba lokhu kusho ngempela kungani izivinini zokugayaza kuyakhula kabusha nge-15% ngonyaka. Izithuthi zidinga izixhobo ezingazange zihlule phansi xa zilahlekelwa umthubi oyingcono ngakwa 30 kuya ku-50%. Isiphephetho sikhule kakhulu ngokudinga kwezisombululo ezinzima kunezinye ezenziwa yi-cutting equipment njengoko ubude buhlala buhamba phambili.

Ukulungiswa Kwesibopho Somlando We-Diamond-Metal Ukuthuthela Kwesibindi

Indlela Esiyiphindisayo Sesifundiso Sisingcise I-Conductivity Yethermal Kwi-Cu/Diamond Composites

Ukudluliswa okuhlukile kwezimali phakathi kwezindikima zika-kopere nezincwadi zediamond kudala izindawo ezincane ezithintela ukudlulisa ukushisa, kuyekwa ukudluliswa kwezimali ngaphezu kuka-60% ikuselwa kwezilinganiso (Zhang et al., 2020). Noma kunjalo 2–5% yomlando kungakweza ukudlulisa ukushisa ngama-30%, kuyekwa ukugunyazwa kwezincwadi zediamond kanye nokuhlukuka kwesithili ngexesha lokugcina ngokukhawuleza.

Ukulungiswa Kwesivinini SeDiamond Kusenzo Umsebenzi Wokuhlangana

Izimvume eziphucayo ziyekisa ukudluliswa okuhlukile kanye nokudlulisa kwezimali, ziyekisa kakhulu ukusebenza kwesivalo:

Uhlobo lokubhoshwa	Ukuthuthwa Kwezimali	Ingeniso Esibalulekile
Tungsten	35–40%	Ukukhokha kwekhabhoni phakathi kuka-Cu nasediamond
Chromium Carbide	25–30%	Iyekisa ukuthando kwezimali ngexesha lokusinda
Scandium Oxide	20–25%	Iyekisa ukudluliswa kwezimali phakathi kwezivinini

Izikhawulo ze-tungsten eziqhubekayo ngomshunxu wasekhanda zange zakhupheka ukulahlekelwa kwesibindi ngama-40% kwi-diamond/Al composites ngokwakha izindlela zokulahlekelwa (Liu et al., 2023).

Isifundo Sombhalo: Izikhawulo ZeTungsten Nezikhawulo ZeCarbide Kuzinkomo ZeDiamond

Ukufakwa kwe-tungsten okudlala amasekondi angama-45 kuzinkomo ze-diamond ezingama-150–200 μm kakhupheka ubunzima bezokudluliswa ngama-28% futhi kugcine isibindi esilahlekelayo esingama-580 W/mK kuzokwakhiwa kwe-copper. Ngokulinganayo kwebhodle 50 nm, leyo yakhupheka ubude bezindlela ngizinhlanu ezimbili kuzivivinyo zokugayaza kwegranite (Alloys Compd., 2018).

Ukulungiselela Okunempilo Kukudluliswa Nokungahleki Kukulahlekelwa Kwesibindi Ezindleni

Ukulinganiswa kwezindawo ezihlukene kudinga ukulawula ngcono izimo zokushisa—izigaba zokushisa zama-800–850°C kanye nesiphazamiso se-35–45 MPa—ukuthuthukisa ukwakha kwe-carbide ngaphandle kokulahleka kwesakhiwo. Izinhlobo eziningi zezinhlobo zeshishini zifinyelela ama-94% wesisibindi esilahlekelayo esithelekayo kwi-Cu/diamond composites ngokugcina izikhala ngelishishini ngelishishini ngokugcina ubunzima bezinkomo ze-diamond (Compos. Pt. A, 2022).

Ukwakheka kweCarbide in-Situ kanye Nezigaba Zokuziphendukela Kwemvelo Zokuthuthukisa Ukuzinza Nokuqhuba Kwezibopho

Ukubola kweTi endaweni ₃I-AlC ₂nendima yayo ekuthuthukiseni izindlela zokushisa

Ngesikhathi sokuxubha, iTi ₃I-AlC ₂ibola ku-1,2001,400°C, ikhiphe i-titanium carbide (TiC) ne-aluminium. Lokhu kuphenduka kwakha amanethiwekhi okushisa axhumene ngaphakathi kwe-matrix, kuqeda izikhala eziseceleni futhi kwandisa ukushisa okushisayo ngo-23% kunezithasiselo ezivamile.

Ukwakheka kwe-TiC kusuka kuma-Precursors: Ukuqinisa Ama-Interface Ngaphandle Kokunikela Ngokuqhuba

Lapho i-titanium ne-carbon ziphendula in situ ngesikhathi sokucindezela okushisayo, zakha izingqimba ze-TiC ezihlangene ebusweni bedayimane, zinciphise ukumelana nokushisa kwe-interface ngama-35%. Nokho, i-titanium engaphezu kuka-8% we-w.t. ikhuthaza izigaba eziphukile eziphakathi kwe-metallic, ezidinga ukulawulwa okuqinile kwe-stoichiometric ukulinganisela ukunamathela nokuqhuba.

Ukuphatha i-Al ₄C ₃Ukwakheka Okuvimbela Ukuqhekeka Ngenkathi Kugcinwa Ukugeleza Kokushisa

Lapho i-aluminium ikhishwa ku-Ti ₃I-AlC ₂i-PVC, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon fiber, i-carbon Nokho, kunenkinga - lapho amazinga okushisa edlula cishe ama-800 degrees Celsius, le aluminium ivame ukudala izakhiwo ezibucayi ezifana nezinaliti ezibizwa ngokuthi i-Al ₄C ₃eziye zenza izinto zibe buthaka ngokuhamba kwesikhathi. Abakhiqizi abahlakaniphile baye basungula izindlela eziphambili zokugcina lesi sigaba esiyinkinga singaphansi kuka-2% womthamo ophelele. Lokhu bakwenza ngokusebenzisa izindlela zokupholisa ngokushesha ezihlanganiswe nezithasiselo ezikhethekile ezifana ne-cobalt ezilawula umsebenzi wekhabhoni phakathi nokucutshungulwa. Okwenza lezi zindlela zibaluleke kakhulu ukuthi zigcina izakhiwo ezibalulekile zomshini njengokuqina kokwephuka okulinganisa okungenani u-12 MPa square root meter, konke lokhu kuyilapho kunikeza amazinga okushisa amangalisayo adlula ama-watt angu-450 ngemitha ngalinye i-kelvin. Lezi zici zibaluleke kakhulu ekugcineni ukuzinza ngesikhathi sokusika ngesivinini esikhulu lapho ukuphathwa kokushisa kuba ukukhathazeka okukhulu.

Ukukhethwa Kokusebenza Kwe-Metal Matrix Nezithasiselo Ukuze Kutholakale Ukusebenza Okukhulu Kakhulu

Umphumela Oqhathaniswa Wethusi NeCobalt Ekuqondiseni Ibhondi Elicindezelwe Eshisayo

Ithusi linokuqhuba kahle ukushisa cishe okungu-400 W/mK yingakho lisebenza kahle kangaka ekuqedeni ukushisa. Kodwa uma kuziwa emandleni, i-cobalt empeleni ibambelela kangcono. Izinombolo nazo ziyasitshela - i-cobalt ingakwazi ukubhekana nama-3,2 GPa ngaphambi kokuba inikeze uma iqhathaniswa nama-2,6 GPa kuphela ethusi. Lokho kusho ukuthi i-cobalt ihlala ingashintshiwe isikhathi eside phakathi nalezo zikhathi ezinzima lapho kucindezela khona. Nokho, muva nje kuye kwaba nentuthuko ethakazelisayo. Lapho abakhiqizi beqala ukuxuba i-tungsten ibe ama-cobalt matrix, bathola izinto ezifinyelela cishe ku-83% walokho okwenziwa yithusi ngokushisa. Futhi lezi zinhlanganisela ezintsha zisagcina cishe u-90% wobulukhuni bazo bokuqala. Ngakho-ke ngokuqinisekile kunentuthuko eyenziwayo ekuhlanganiseni izici ezinhle kakhulu zazo zombili izinsimbi.

Ubunjiniyela Bokwengeza: Ukulinganisela Amandla Omshini Nokukhishwa Kwamalahle

Lapho ososayensi bezingxenye zokwakha befaka izinto zokuqinisa ezifana ne-tungsten carbide (WC) noma i-silicon carbide (SiC), zithola ukumelana nokugqoka okungcono kanye nezakhiwo zokuphatha ukushisa ezingcono. Ngokwesibonelo, ukuxuba amaphesenti angu-5 kuphela e-WC ngethusi kuqinisa amandla okugqoka ngo-40%, kuyilapho kunciphisa ukulahleka kokushisa kuze kufike ku-12% ngokusho kocwaningo olushicilelwe kuyi-Materials Science Reports ngo-2022. Lezi zibalo zibaluleke kakhulu ezimweni ezingokoqobo njengokusika ukhonkolo. Ama-blade asetshenziswa lapho avame ukuhlangana namabala afinyelela cishe kuma-800 degrees Celsius phakathi nokusebenza, kodwa nokho akwazi ukugwema ukugoba noma ukuhlukana nezinto zawo zokwakha naphezu kwalezo zimo ezimbi kakhulu.

Amasu Okuthuthukisa Ukucubungula Ukuze Kuncishiswe Amaphutha Futhi Kuthuthukiswe Ukuqhuba

Ukucindezela Okushisayo vs. Ukungena Kokungenayo: Umthelela Ekhwalithi Yesixhumi Esibonakalayo

Ukucindezela okushisayo kusebenzisa ukushisa nokucindezela ngasikhathi sinye ukukhiqiza izibopho ezixineneyo, ezinama-porosity aphansi ukunciphisa okuqukethwe kokungenalutho ngama-32% uma kuqhathaniswa nokufakwa ngaphandle kwengcindezi (Journal of Materials Processing, 2023). Lokhu kuholela ekunciphiseni izikhala eziphakathi nendawo nokudluliswa kokushisa okuphumelela kakhudlwana.

Indlela Yokulungisa	Ukucindezela Okufakiwe	Ingcenye Ehlukile	Ukuhlangana Nokunyusela (W/mK)	Izicelo
Ukucindezela Okushisayo	30–50 MPa	Iqeda ukungena kwamanzi	550–650	Amathuluzi okusika ngesivinini esikhulu
Ukungena Ngaphandle Kokucindezela	Izindawo ezizungezile	Iindleko ezincane zezinhlobo zokusebenza	320–400	Izithako ezipholishayo

I-porosity esele (kufika ku-12%) ekufakeni okungenazo izingcindezi idala izingqinamba ezishisayo, kunciphisa ukusebenza kahle kokushabalalisa ukushisa ngo-1927% (Ukubuyekezwa Kobunjiniyela Bokushisa, 2022).

Ukwenza ngcono amapharamitha okucindezela ashisayo ezakhiweni eziqinile, ezingenaziphambeko ezincane

Izici ezintathu ezibalulekile zinquma ukusebenza kokushisa kwama-blade acindezelwe ashisayo:

1. Amathambo wethempurhijha Ukugcina amazinga okushisa angu-850°C kuya ku-900°C kugwema ukubola kwedayimane kuyilapho kuvumela ukugeleza okuphelele kwensimbi
2. Isikhathi sokuhlala Imijikelezo yemizuzu engu-8 kuya kwengu-12 iqinisekisa ukuqina okuphelele ngaphandle kokusabela ngokweqile
3. Amanani okupholisa Ukucwiliswa okulawulwayo ku-15°C/min-20°C kunciphisa ukucindezelwa okusele

Ukucindezela okushisayo okulungiselelwe amapharamitha kuboniswe ukuthi kuthuthukisa ukushisa okungu-38% kunemikhuba ejwayelekile, okuholela esikhathini sokuphila se-blade esingu-22% ngesikhathi sokusika igranite (Advanced Materials Proceedings, 2023).

Imibuzo Evame Ukubuzwa