Ƙungiya ta masana kimiyya daga NUST MISIS sun haɓaka kayan yumbu tare da mafi girma na narkewa a tsakanin abubuwan da aka sani a halin yanzu. Saboda da musamman hade na jiki, inji da thermal Properties, da kayan yana da alƙawarin don amfani a cikin mafi zafi da aka ɗora Kwatancen sassa na jirgin sama, kamar hanci fairings, jet injuna da kaifi gaban fuka-fuki aiki a yanayin zafi sama da 2000 digiri C. Ana buga sakamakon a cikin Ceramics International.

Yawancin manyan hukumomin sararin samaniya (NASA, ESA, da hukumomin Japan,Chinada Indiya) suna haɓaka jiragen sama da za a sake amfani da su, wanda zai rage farashin jigilar mutane da kaya zuwa kewayawa, tare da rage tazarar lokaci tsakanin jiragen.

“A halin yanzu, an samu gagarumin sakamako wajen samar da irin wadannan na’urori. Misali, rage radius na gefuna masu kaifi na gaba na fuka-fuki zuwa ƴan santimita kaɗan yana haifar da haɓakar haɓakar ɗagawa da motsa jiki, gami da rage ja da iska. Duk da haka, lokacin da ake fita daga sararin samaniya da sake shiga cikinsa, a saman fuka-fukan jirgin, ana iya ganin yanayin zafi na kimanin digiri 2000 C, ya kai 4000 digiri C a daidai gefen. Don haka, idan aka zo ga irin wannan jirgin, akwai wata tambaya da ke da alaƙa da ƙirƙira da haɓaka sabbin kayan da za su iya aiki a irin wannan yanayin zafi,” in ji Dmitry Moskovskikh, shugaban Cibiyar NUST MISIS don Gina Kayan yumbura.

A lokacin abubuwan da suka faru na baya-bayan nan, makasudin masana kimiyya shine ƙirƙirar wani abu mai mahimmancin narkewa da manyan kayan aikin injiniya. An zaɓi tsarin hafnium-carbon-nitrogen sau uku, hafnium carbonitride (Hf-CN), kamar yadda masana kimiyya daga Jami'ar Brown (US) a baya suka yi annabta cewa hafnium carbonitride zai sami babban yanayin zafi da juriya ga iskar oxygen, da kuma mafi girma narkewa. aya a tsakanin duk sanannun mahadi (kimanin digiri 4200 C).

Amfani da hanyar kai-propagating high-zazzabi kira, da NUSTMISIS masana kimiyya samu HfC0.5N0.35, (hafnium carbonitride) kusa da ka'idar abun da ke ciki, tare da wani babban taurin 21.3 GPa, wanda shi ne ko da mafi girma fiye da a cikin sabon alkawari kayan. kamar ZrB2/SiC (20.9 GPa) da HfB2/SiC/TaSi2 (18.1 GPa).

“Yana da wuya a auna wurin narkewar abu idan ya wuce digiri 4000. Sabili da haka, mun yanke shawarar kwatanta yanayin zafi na narkewar fili da kuma zakara na asali, hafnium carbide. Don yin wannan, mun sanya samfuran HFC da HfCN da aka matsa akan farantin graphite mai siffa kamar dumbbell, kuma mun rufe saman da irin wannan farantin don guje wa asarar zafi, ”in ji Veronika Buinevich, NUST MISIS daliba bayan kammala karatun digiri.

Bayan haka, sun haɗa shi da baturi ta amfani damolybdenum electrodes. An yi duk gwaje-gwaje a cikin zurfivacuum. Tun da ɓangaren giciye na faranti na graphite ya bambanta, an kai matsakaicin zafin jiki a cikin mafi ƙanƙanta. Sakamakon dumama lokaci guda na sabon abu, carbonitride, da hafnium carbide, ya nuna cewa carbonitride yana da mafi girma na narkewa fiye da hafnium carbide.

Koyaya, a halin yanzu, takamaiman wurin narkewa na sabon abu yana sama da digiri 4000 C, kuma ba a iya tantance shi daidai a cikin dakin gwaje-gwaje ba. A nan gaba, ƙungiyar ta yi shirin gudanar da gwaje-gwaje kan auna zafin narke ta hanyar pyrometry mai zafi ta hanyar amfani da Laser ko juriya na lantarki. Har ila yau, suna shirin yin nazarin aikin hafnium carbonitride da aka samu a cikin yanayin hypersonic, wanda zai dace don ƙarin aikace-aikace a cikin masana'antar sararin samaniya.