Boka revasayendisiti kubva kuNUST MISIS vakagadzira simbi yeceramic ine nzvimbo yepamusoro yekunyungudika pakati pemakomboni anozivikanwa parizvino. Nekuda kwekusangana kwakasarudzika kwemuviri, mekiniki uye kupisa zvivakwa, zvinhu zviri kuvimbisa kushandiswa mune zvakanyanya kupisa-zvakaremerwa zvikamu zvendege, senge mhuno, jet injini uye kumberi kwakapinza kwemapapiro anoshanda pakudziya kwepamusoro pe2000 degrees C. Mhedzisiro yacho inoburitswa muCeramics International.

Mazhinji anotungamira nzvimbo masangano (NASA, ESA, pamwe nemasangano eJapan,ChinaneIndia) varikushingairira kugadzira ndege dzemuchadenga, izvo zvinozodzikisa zvakanyanya mutengo wekuendesa vanhu uye mitoro kutenderera, pamwe nekuderedza nguva dzekufamba pakati pendege.

“Parizvino, mabudiro makuru akaitwa mukugadzirwa kwemidziyo yakadai. Semuyenzaniso, kudzikisa denderedzwa renzvimbo yakapinza yemapapiro epamberi kusvika masendimita mashoma kunotungamirira kukuwedzera kukuru kwekusimudza uye kufambisa, pamwe nekuderedza aerodynamic drag. Zvisinei, pakubuda mumhepo yakapoteredza pasi uye kupindazve mairi, pamusoro pemapapiro emuchadenga, tembiricha ingangoita 2000 madhigirii C inogona kucherechedzwa, inosvika 4000 madhigirii kumucheto chaiko. Naizvozvo, kana zvasvika kundege yakadai, pane mubvunzo une chekuita nekusikwa nekuvandudzwa kwezvinhu zvitsva zvinogona kushanda pakupisa kwakanyanya kudaro,” anodaro Dmitry Moskovskikh, mukuru weNUST MISIS Center for Constructional Ceramic Materials.

Munguva yezvichangobva kuitika, chinangwa chemasayendisiti chaive chekugadzira zvinhu zvine nzvimbo yepamusoro yekunyungudika uye yakakwirira michina. Iyo katatu hafnium-carbon-nitrogen system, hafnium carbonitride (Hf-CN), yakasarudzwa, sesainzi kubva kuBrown University (US) yakambofanotaura kuti hafnium carbonitride yaizove nepamusoro yekupisa conductivity uye kuramba kune oxidation, pamwe nekunyungudika kwakanyanya. pfungwa pakati pezvinhu zvose zvinozivikanwa (inenge 4200 degrees C).

Vachishandisa nzira yekuzviparidzira yakakwirira-tembiricha synthesis, iyo NUSTMISIS masayendisiti akawana HfC0.5N0.35, (hafnium carbonitride) padyo neiyo theoretical kuumbwa, nekuoma kwakanyanya kwe21.3 GPa, iyo yakatokwirira kupfuura mune zvitsva zvinovimbisa zvinhu, zvakadai seZrB2/SiC (20.9 GPa) uye HfB2/SiC/TaSi2 (18.1 GPa).

“Zvakaoma kuyera kunyungudika kwechinhu kana ichidarika madhigirii 4000 С. Naizvozvo, takasarudza kuenzanisa kunyunguduka kwekushisa kwekomboni yakasanganiswa uye shasha yepakutanga, hafnium carbide. Kuti tiite izvi, takaisa sampuli dzakamanikidzwa dzeHFC neHfCN pandiro yegraphite yakaita sedumbbell, uye takavhara pamusoro nendiro yakafanana kudzivirira kurasikirwa nekupisa, "anodaro Veronika Buinevich, NUST MISIS mudzidzi akapedza kudzidza.

Zvadaro, vakaibatanidza nebhatiri vachishandisamolybdenum electrodes. Miyedzo yese yakaitwa mukadzikavacuum. Sezvo kuyambuka-chikamu chegirafu mahwendefa akasiyana, iyo yakanyanya tembiricha yakasvikwa mune yakamanikana chikamu. Mhedzisiro yekupisa panguva imwe chete yezvinhu zvitsva, carbonitride, uye hafnium carbide, yakaratidza kuti carbonitride ine nzvimbo yakakwirira yekunyungudika kupfuura hafnium carbide.

Nekudaro, panguva ino, iyo chaiyo yekunyungudika kwezvinhu zvitsva iri pamusoro pe4000 madhigirii C, uye haigone kutariswa chaizvo murabhoritari. Mune ramangwana, timu inoronga kuita zviyedzo pakuyera kunyunguduka kwekushisa nepamusoro-tembiricha pyrometry uchishandisa laser kana magetsi kuramba. Vanorongawo kudzidza mashandiro eiyo hafnium carbonitride inokonzeresa mune hypersonic mamiriro, ayo anozove akakodzera kune imwezve kushandiswa muindasitiri yeaerospace.