Okusanda 3000°C I-Ablative Ceramic Coating Ithuthukiswe Ngokuphumelelayo - I-Multi-boron-containing Single-phase-Carbide

(Okusha 3000°C I-Ablative Ceramic Coating Ithuthukiswe Ngokuphumelelayo - I-Multi-boron-containing Single phase Carbide )

I-Boron carbide (eyaziwa nangokuthi idayimane elimnyama) inohlobo lwe-molecular B4C. Ivamise ukuba grey ngombala kanye nempushana. Isetshenziselwa izikhali zomzimba, izikhali zethangi, nezinye izinhlelo zokusebenza zezimboni. Inobunzima be-Mohs 9.3.
Inani elikhulu lokuhlolwa liye laholela ekuthuthukisweni kwengubo entsha ye-ceramic ka-Huang Boyun, Isazi se-Academician e-National Laboratory of Powder Metallurgy yase-Central South University. Lokhu kuphumelela kungavula umnyango wezimoto ze-hypersonic.

USolwazi Xiong Xiang we-Institute of Powder Metallurgy e-Central South University uthe i-hypersonic flying isivinini esilingana noma esingaphezu kokuphindwe kahlanu kunejubane lomsindo. Okusho ukuthi, ihamba okungenani amakhilomitha ayizi-6,120 ngehora. Uma izici eziyinhloko zesakhiwo sendiza zikwazi ukumelana nokungqubuzana komoya okwedlulele nomthelela wokushisa, isikhathi sendiza esuka e-Beijing ukuya eNew York sizothatha amahora angaphansi kwama-2. . Izindwangu zobumba ezisanda kutholwa zaseCentral South University nezihlanganisiwe zinikeza ukuvikeleka okukhulu ezingxenyeni. I-quaternary yokuqala yesigaba esisodwa emhlabeni, equkethe i-boron, i-carbide yamazinga okushisa aphakeme kakhulu okushisa yenziwe nge-ceramic material. Lokhu kunamathela kuphelele "ekuhlanganiseni" kwezinto ze-carbon-carbon. Ucwaningo ngezinto ezixubene ezinhlelweni zenhlanganisela kanambambili yikona okugxilwe kakhulu kwensimu entsha yezinto ezibonakalayo. Ukusetshenziswa ngempumelelo kwalezi zinto ezinhlelweni ze-hypersonic kuzozuza kakhulu ekuthuthukisweni kwazo.

Inoveli ye-ceramic ehlanganiswe i-carbon/carbon material eyenziwe nge-quaternary-boron-containing single phase carbide yenziwe nge-zirconium titanium carbon, carbon, nezinye izakhi ze-boron. Isigaba se-multi-ceramic yethulwa kwinhlanganisela ye-porous carbon/carbon ngokusebenzisa inqubo yokungena. Ihlanganisa ukuguquguquka kwezinga lokushisa eliphezulu kwama-carbides kanye nezakhiwo ze-antioxidation. Ama-composites nama-coatings aphakeme ngokwemibandela yokukhishwa nokumelana nokushaqeka. I-ceramic oxide iyakwazi ukumelana namazinga okushisa aphezulu angama-3000 ° C. Izinga lokulahlekelwa kwe-Ablation.

Izinga lokushisa eliphakeme kakhulu le-ceramic lihlanganisa ukuguquguquka kwezinga lokushisa eliphezulu kusuka kuma-carbides nezici zokulwa ne-oxidation. Yilokhu okubenza babe yingxenye ebalulekile yezimoto ze-hypersonic. U-Xioning Xiang uthe lezi yizingxenye ezithembisayo kakhulu.

I-Nature Communications ishicilele imiphumela yocwaningo evela ethimbeni lokuthuthukisa ngoJuni 15. Iyunithi yokuqala yokuqedela ithisisi yi-State Key Laboratory ye-Powder Metallurgy yaseCentral South University. UZeng Yi kanye noSolwazi Xiong Xiang bangabokuqala ukubhalelana. UDkt. Xiong Xiang ungumbhali wokuqala. INyuvesi yaseManchester (e-UK) yaba ngeyokuqala ukuhlaziya nokuveza imininingwane.

Ngemva kokushicilelwa, lesi sihloko sathola ukunakwa okukhulu emibuthanweni yezemfundo emhlabeni wonke nakwabezindaba. Phakathi nezinsuku ezintathu, lesi sihloko sase sidawunilode izikhathi ezingaphezu kuka-5,000 300. Izindatshana ezifanayo zalandwa phakathi kwezikhathi ezingama-900 nezingama-XNUMX. Lolu cwaningo belumbozwe abezindaba abaningi abajwayelekile, okuhlanganisa neBritish Daily Mail kanye neThe Economist. I-United States Yahoo and Public Machinery kanye ne-Russian Satellite News Agency nezinye izikhungo zemfundo ezigunyaziwe. . Umbuyekezi weNature Newsletter uthe, “Imiphumela yocwaningo engenhla izovusa umdlandla kwezemfundo kanye nentshisekelo yokusebenzisa izinhlelo ze-quaternary material ku-hypersonic force, njengoba lolu kuwuhlelo lwezinto ezibonakalayo olunethemba elikhulu.”

Ngosizo lwe-National 863 kanye ne-973 Foundations, uProfesa Chang Xiang (isazi sase-Yangtze River), leli thimba belisebenza ngokugcotshwa kwe-antioxidation yezinhlanganisela ze-carbon/carbon ezingeni lokushisa eliphakathi nendawo (1600°C). Lokhu kwenziwe ngokwesekwa yiNational Natural Science Foundation. Kufanele ubheke i-ultra-high lokushisa i-ceramic coating enokumelana okuhle kakhulu kwe-oxidation. Isistimu yezinto ezibonakalayo yahlolelwa lokhu okulandelayo: i-titanium carbide; i-strontium carbide; i-zirconium boride; i-tantalum carbide. Iphinde yahlanganisa inqwaba yezinto ezisezingeni eliphezulu. Kuthathe iminyaka engu-15 ukuzuza impumelelo ekuthuthukisweni kwezindwangu zobumba ezimelana nokukhipha umoya emazingeni okushisa aphezulu kakhulu (3000°C).

I-Luoyang Tech Co., Ltd, ingumkhiqizi we-Boride Powder oneminyaka engaphezu kwe-12 yesipiliyoni sokuthuthukiswa kwemikhiqizo yamakhemikhali kanye nocwaningo. Uma ufuna i-Boride Powder yekhwalithi ephezulu, sicela usithinte.

(Okusha 3000°C I-Ablative Ceramic Coating Ithuthukiswe Ngokuphumelelayo - I-Multi-boron-containing Single phase Carbide )