Molybdenum Kashe kansa, MoSi2

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Molybdenum Kashe kansa, MoSi2

Rushewar Molybdenum (Molybdenumdisilicide, MoSi2) wani nau'in mahallin molybdenum ne na silinon, saboda radius din atom guda biyu sun yi kama, wutar lantarki tana kusa, saboda haka yayi kama da yanayin karfe da yumbu.


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Rushewar Molybdenum (Molybdenumdisilicide, MoSi2) wani nau'in mahaɗan molybdenum ne na silinon, saboda radius atomic biyu sun yi kama da juna, wutar lantarki tana kusa, saboda haka yayi kama da yanayin ƙarfe da yumbu. Tare da narkakken wuri har zuwa 2030 ℃ da lantarki conductivity, silicon dioxide passivating Layer za a iya kafa a farfajiya a babban zafin jiki don hana kara hadawan abu da iskar shaka. Bayyanar sa launin ruwan toka ne mai launin toka, wanda ya samo asali daga tsarinta mai siffar murabba'i mai nau'i hudu, sannan kuma akwai kyakkyawan yanayi mai daidaitaccen yanayi amma wanda ba mai karko ba. Ba shi narkewa a cikin mafi yawan acid, amma mai narkewa ne a cikin sinadarin nitric da hydrofluoric acid.
MoSi2 wani nau'in mesophase ne wanda yake dauke da sinadarin siliki mafi girma a cikin tsarin gami da bin-binary alloy.Wannan wani nau'ine ne na kayan zafin jiki mai matukar kyau tare da kyakkyawan aiki. Kyakkyawan juriya na maganin zafin jiki mai kyau, yanayin zafin jiki na iska har zuwa 1600 ℃, daidai da SiC; Matsakaici yawa (6.24g / cm3); eananan haɓakar haɓakar thermal (8.1 × 10-6K-1); Kyakkyawan haɓakar wutar lantarki; Babban zafin jiki mai saurin juyewar juyi (1000 ℃) a ƙasa da yumbu - kamar ƙarancin ƙarfi. A 1000 ℃ sama da ƙarfe kamar roba mai taushi.MoSi galibi ana amfani dashi azaman ɗumama dumu dumu, haɗaɗɗiyar kewaya, murfin hana zafin jiki mai yawan zafin jiki da kayan zafin jiki mai girma.In MoSi2, molybdenum da siliki suna da alaƙa ta ƙarfe da sarƙoƙi, silicon da silicon suna da alaƙa da haɗin covalent, kuma molybdenum kashewa shine mai launin ruwan toka mai launin quadripartite wanda ba shi narkewa cikin babban ma'adinai (ciki har da aqua aqua), amma mai narkewa a cikin cakuda nitric acid da hydrofluoric acid, yana da kyakkyawan yanayin zafin jiki mai zafin jiki kuma yana iya amfani da shi azaman babban zafin jiki (& LT; Sinadarin dumama yanayi yana aiki a yanayin sararin samaniya a 1700 ℃. A cikin yanayin shakar iska, ana samar da wata kariya mai kariya a saman gilashin silica mai nauyi (SiO2) da aka kone a zazzabi mai zafi don hana ci gaba da hadawan abu da iskar shaka na Lokacin da zafin jiki na maɓallin dumama ya fi 1700 ℃, ana ƙirƙirar fim ɗin SiO2, wanda ya yi kauri a 1710 ℃ kuma aka haɗa shi da
SiO2 cikin zubi mai narkewa Saboda motsi na fadada shi, ya rasa ikon kare shi.Karkashin aikin oxidant, lokacin da sinadarin yake ci gaba da amfani dashi, zai sake samarda fim mai kariya.Ya kamata a sani cewa saboda hadawan abu mai karfi a ƙananan yanayin zafi, ba za a iya amfani da sinadarin tsawon lokaci a 400-700 ℃ .Molybdenum disilicide ana amfani da shi a cikin filayen kayan zazzabi mai hana zafin jiki mai ɗumi, abubuwan dumama wutar lantarki, finafinan lantarki masu haɗa kai, kayan aiki, ƙarfafa kayan haɗi, sa kayan da basu dace ba, kayan hada kayan kwalliya, da sauransu. Ana rarraba shi a masana'antu masu zuwa:

1) Masana'antar sinadaran makamashi: abubuwan dumama wutar lantarki, masu musayar zafin zafin jiki mai girma don shigarwar atomic reactor, masu amfani da iskar gas, thermocouples masu zafin jiki masu zafi da bututunsu masu kariya, abin kwalliya don kayan narkewa (ana amfani dashi don narkewar sodium, lithium, lead, bismuth, tin da sauran karafa ).

2) Masana'antar ta lantarki: MoSi2 da sauran silsilar karafa Ti5Si3, WSi2 da TaSi2 sune mahimman candidatesan takara don GATE da kuma finafinan haɗin kai na LSI.

3) Masana'antar Aerospace: Bincike mai zurfin gaske kuma anyi amfani dashi azaman kayan shafa mai maganin zafin jiki mai zafin jiki Musamman a matsayin kayan aikin injin turbin, kamar su ruwan wukake, impeller, burner, bututun ƙarfe da hatimin kayan abu.Molybdenum disilicide ya zama sabon wuri mai zafi a binciken kayan haɗin gine-gine kamar kayan gini waɗanda aka yi amfani da su a cikin abubuwa masu zafin jiki, masu ƙone gas, nozzles, matattarar zafin jiki mai ƙarfi da matosai na walƙiya don zirga-zirgar jiragen sama da turbines na mota. Babbar matsalar wannan aikace-aikacen ita ce taɓarɓarewar jiki a yanayin zafin jiki da ƙananan ƙarfi a zazzabi mai ƙarfi .Saboda haka, ƙananan zafin jiki mai ƙarfi da ƙarfafa zafin jiki na molybdenum disilicate sune mahimman fasahohin don aikace-aikacenta azaman kayan gini.Kamar sakamakon ya nuna cewa haɗuwa da haɓaka abubuwa masu amfani ne don haɓaka ƙarfi da ƙarfin zafin jiki mai ƙarfi na molybdenum wanda aka lalata a yanayin zafin jiki. Abubuwan da aka saba amfani dasu a moly Bdenum disilicide alloying shine kawai yan silicides wadanda suke da irin wannan ko kuma irin wannan mahaɗar lu'ulu'u tare da kashewar molybdenum, kamar su WSi2, NbSi2, CoSi2, Mo5Si3 da Ti5Si3, daga cikinsu WSi2 shine mafi dacewa. Babu shakka sun ɓace, kuma an iyakance aikace-aikacen.An tabbatar da cewa kashewar molybdenum yana da kyakkyawan yanayin haɓakar sinadarai da ƙarfin aiki tare da kusan dukkanin ma'aikatan ƙarfafa yumbu (kamar SiC, TiC, ZrO2, Al2O3, TiB2, da sauransu).
Saboda haka, hanya mafi inganci don inganta kayan aikin inji na molybdenum disilicate shine shirya molybdenum disilicate composite.


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