Molybdenum Silicide, MoSi2

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Molybdenum Silicide, MoSi2

Molybdenum disilicide (Molybdenumdisilicide, MoSi2) imhando yesilicon molybdenum makomputa, nekuti iwo maviri maatomu radius aive akafanana, electronegativity padhuze, saka yakafanana nehunhu hwesimbi uye zvedongo.


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Molybdenum disilicide (Molybdenumdisilicide, MoSi2) imhando yesilicon molybdenum makomputa, nekuti iwo maviri maatomu radius aive akafanana, electronegativity padhuze, saka yakafanana nehunhu hwesimbi uye zvedongo. Nenongedzo inokwira kusvika kusvika 2030 ℃ nemagetsi. kuitisa, silicon dioxide inopfuura inotenderera inogona kuumbwa pamusoro pekupisa kwakanyanya kudzivirira kumwe kusvibiswa. Chitarisiko chayo chitsvuku simbi ruvara, yakatorwa kubva kune yayo quadric -type kristaro chimiro, uye kune zvakare akaenzana - asi asina kugadzikana - akagadziridzwa kristaro chimiro. Isina kubhururuka mune akawanda maacid, asi inosungunuka mu nitric acid uye hydrofluoric acid.
MoSi2 rudzi rwemesophase ine yakanyanya silicon yezvinyorwa mune mo-SI binary alloy system.Iyo mhando yeakanyanya tembiricha zvinhu ine yakanakisa mashandiro.Good yakakwira tembiricha oxidation kuramba, oxidation inodziya tembiricha inosvika 1600 ℃, yakaenzana neSiC; Moderate density (6.24g / cm3); Yakadzika yekupisa yekuwedzera coefficient (8.1 × 10-6K-1); Yakanaka magetsi kuitisa; Yakakwira brittle ductile shanduko tembiricha (1000 ℃) pazasi peiyo ceramic - seyakaomarara brittleness. Pa 1000 ℃ pamusoro pesimbi senge soft plastic.MoSi inonyanya kushandiswa seyakaipisa elementi, yakasanganiswa wedunhu, yakanyanya tembiricha inorwisa-oxidation yekupisa uye yakanyanya tembiricha mamiriro ezvinhu MuMoSi2, molybdenum nesilicon zvakasungwa nesimbi zvisungo, silicon nesilicon zvakasungwa ne covalent zvisungo, uye molybdenum disilicide Isina kubhururuka mune zvakawandisa zvicherwa (kusanganisira aqua aqua), asi yakanyungudika mumusanganiswa we nitric acid uye hydrofluoric acid, ine yakanaka yepamusoro tembiricha antioxidant kugona uye inogona kushandiswa senge tembiricha yakakwira (& LT; Heating element inoshanda munzvimbo ine oxidizing pa1700 In .Mumhepo ine oxidizing, dziviriro inoumbwa pamusoro penzvimbo yegirazi resilika (SiO2) yakapiswa patembiricha yepamusoro kudzivirira kuenderera kweiyo oxidation ye molybdenum disilicate.When iyo tembiricha yechinhu chinopisa chakakwirira kupfuura 1700 ℃, SiO2 inodzivirira firimu inoumbwa, iyo yakasimbiswa pa1710 ℃ uye yakasanganiswa ne
SiO2 mumadonhwe akanyungudika. Nekuda kwekufamba kwekuwedzera kwayo kwepamusoro, inorasikirwa nekugona kwayo kwekudzivirira.Pasi pechiito cheiyo oxidant, iyo chinhu painoramba ichishandiswa, inogadzira firimu rekudzivirira zvakare.Iye inofanira kucherechedzwa kuti nekuda kweiyo yakasimba oxidation pa yakadzika tembiricha, iyo element haigone kushandiswa kwenguva yakareba pa400-700 ℃ .Molybdenum disilicide inoiswa muminda yeakanyanya-tembiricha inorwisa-oxidation yekupfeka zvinhu, zvemagetsi kudziisa zvinhu, zvakasanganiswa zvemagetsi mafirimu, zvivakwa zvemukati, kusimbisa kwezvinhu zvinoumbwa, pfeka zvinodzivirira zvinhu, zvekubatanidza zvishandiso zveyakaumbwa ceramics, nezvimwewo Iyo inogoverwa mune anotevera maindasitiri:

1) Simba remakemikari indasitiri: emagetsi kudziyisa zvinhu, kwakanyanya kupisa kupisa kuchinjisa kweatomiki magetsi kuisa, gasi zvinopisa, yakanyanya tembiricha thermocouples uye avo ekudzivirira machubhu, chinozunguzika chekunyungudika midziyo (inoshandiswa mukunyungudutsa sodium, lithiamu, lead, bismuth, tini nezvimwe simbi. ).

2) Microelectronics indasitiri: MoSi2 uye imwe inokanganisa simbi silicides Ti5Si3, WSi2 uye TaSi2 ndivo vakakosha kukwikwidza kuGATE nekubatana matete mafirimu eLSI.

3) Aerospace indasitiri: Zvakawanda uye zvakadzama kuongororwa uye kuiswa seyakanyanya tembiricha antioxidant yekumhara zvinhu.Es kunyanya seinjini injini zvinoriumba, senge mashizha, impeller, burner, kamwene uye yekuisa chisimbiso mudziyo zvinhu.Molybdenum disilicide yazova hotspot yazvino mukutsvaga kwe intermetallic komponi yezvivakwa zvinhu senge zvivakwa zvekushandisa zvinoshandiswa munzvimbo dzakanyanya kupisa, gasi zvinopisa, mabhureki, mafirita ekupisa tembiricha uye mapulagi emoto ekuvhiya uye mota gasi turbines.Chivharo chikuru pachishandiswa ichi kupwanya kwayo kukuru mukamuri tembiricha uye simba rakaderera patembiricha yakakwira. Saka, iyo yakaderera tembiricha yakasimba uye yakakwirira tembiricha inosimbisa ye molybdenum disilicate ndiwo makiyi matekinoroji ekushandisa kwayo seyakaumbwa zvinhu.Mhedzisiro inoratidza kuti kunyorera uye kuumbiridza inzira dzinoshanda dzekuvandudza kuomarara uye kwakanyanya tembiricha simba re molybdenum disilicate pakamuri tembiricha. The zvinoriumba inowanzoshandiswa moly bdenum disilicide alloying ingori mashoma silicides ane akafanana kana akafanana kristaro junesi nemolybdenum disilicide, senge WSi2, NbSi2, CoSi2, Mo5Si3 uye Ti5Si3, pakati peiyo WSi2 ndiyo inonyanya kukosha. zvaive pachena kuti zvakarasika, uye mashandisiro acho aive mashoma. Zvave zvichiratidzwa kuti molybdenum disilicide ine yakanaka makemikari kugadzikana uye kugona kugona pamwe neese maceramic ekusimbisa vamiririri (seSiC, TiC, ZrO2, Al2O3, TiB2, nezvimwewo).
Naizvozvo, nzira inoshanda kwazvo yekuvandudza michina molybdenum disilicate ndeyekugadzirira molybdenum disilicate composite.


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