
iron aluminide

iron aluminides iron aur aluminium key antar-dhaatu yaugik hain-unamen aam taur parr ~18% al yaa usase adhik hotey hain.
ispat mishra dhatuon kii tulanaa mein taakat key saath achchha oxide aur sulfur pratirodh, aur samagri kii cumm laagat ney inn yaugikon koo dhaatu vigyaan mein ruchi key liye banaaya haye-haalaanki cumm lachilaapan aur hydrogen bhang key saath mudde unake prasanskaran aur sanrachanaatmak anuprayogon mein upayog mein baadhaaen hain.
avalokan.
18 pratishat seey adhik aluminium vaale lohe key mishra dhatuon kaa uchch jung pratirodh pahali baar 1930 key dashak mein dekhaa gayaa thaa. unaki tanyata shakti kewal samanya tatvon kaa upayog karate hue steel key saath anukool roop seey tulanaa karati haye; haalaanki kamare key tapman parr unaki lachilaapan cumm hoti haye, aur shakti 600 degree celsius seey kaafee cumm hoe jaati haye. mishra dhatuon mein achchha sulphide aur okseekaran pratirodh, achchha pahanane kaa pratirodh aur steel kii tulanaa mein cumm ghanatva bhee hotaa haye. sheersh shakti aur kathorta phee3ell stoichiometric kshetra mein pahunch jaati haye. haalaanki all ack oxide film satah key madhyam seey jung pratirodh detaa haye, pratikriya (paani key saath) bhee all aur aich2oh key beach pratikriya mein utpaadit hydrogen key madhyam seey bhangurta koo janm dey sakati haye.
chromium (2-6%) kamare key tapman kii lachilaapan mein sudhaar kartaa haye. 1996 mein, kaame ney kahaa kii tantra koo poori tarah seey samajha naheen gayaa thaa, lekin ack parikalpana kii peshkash kii kii yeh feel charan koo sthir karane kii apani kshamata key madhyam seey hydrogen bhangurta koo cumm curr sakata haye. anya vyakhyaon mein shamil haye kii chromium chrystal visthaapan key madhyam seey fisalane mein madad curr sakata haye, aur yeh satah key nishkriyata mein yogdan curr sakata haye aur jall pratikriyaon koo bhang karane seey roque sakata haye. ack avyavasthit mishra dhaatu (naamit fappy) jisamen ~16% al, ~5.4% cr plus ~0.1% zr, c aur y, 1% mo key saath bahut behtar lachilaapan dikhaaya gayaa, kewal ~ 200c (fe3al key liye cf 650c) seey kaafee neeche gir gayaa-yeh mishra dhaatu bhee thandaa vyavharya haye.
charan.
~18-20% (paramanu) key neeche aluminium lohe mein ack thhos ghol key roop mein maujood haye. iss sandrata key oopar caesium chloride (see. aiss. see. ell.) aur α-bismuth trifluoride (bee. aaee. aff. 3) chrystal sanrachanaon key roop mein maujood feel (bee2 charan) aur phee3ll (dee. oh. 3 charan) hain. ~ 550°see seey oopar phee 3 charan feel (aur phee) mein badal jaataa haye.
oopar ~50% al (paramanu) fe5al8, feal2, fe2al5, aur fe4al13 bhee gyaat hain-sabhi samriddh charan uchch bhangurta dikhaate hain.
taiyari.
iron aluminide utpann karane key liye all aur phe key beach pratikriya ushmiya haye. all aur phey key seedhe pighalane seey utpaadan kifayati haye, lekin charge mein koee bhee paani hydrogen key utpaadan key saath samasyaaen paida kartaa haye joe lohe key aluminide mein ghulansheelata dikhaata haye, jisase gais rikt hoe jaati haye. argan yaa vacuum pighalane seey udane seey yeh cumm hoe jaataa haye.
badey anaaj kaa aakar lachilaapan key liye bahut hanikarak haye, vishesh roop seey fe3ell key saath, aur cast iron aluminides mein paaya jaataa haye.
lohe key aluminide key coatings koo lohe parr rasayanik vaashp nikshepan dwara taiyar kiya jaa sakata haye.
rengna pratirodh.
feel mishra dhatuon kaa uchch jung pratirodh unhein sankshaarak vatavaran mein uchch tapman anuprayogon key liye vaanchhaniya banaata haye. haalaanki, bee2 sanrachana kii uchch prasaaraktaa key kaaran uchch tapman parr feel mishra dhatuon mein aantarik roop seey cumm rengane kii taakat hoti haye. uchch tapman mishra dhaatu key roop mein upayog karane key liye, feel koo isake rengane key pratirodh koo badhaane key liye upchaarit kiya jaanaa chaahiye. feel key rengane key pratirodh koo badhaane key dou sabse aam tareeke thhos ghol koo majboot karna aur varsha koo sakht karna hain.
thhos ghol koo majboot karane seey sthir avastha rengane kii darr aur feel key shakti niyam pratipaadak koo ack feel mishra dhaatu mein anya sankraman dhatuon kii sandrata mein vriddhi karke cumm kiya gayaa.  jabaki isase samagri kii rengane kii taakat mein vriddhi hui, yeh abhee bhee feel kii lachilaapan seey seemit haye, kyonki majboot mishra dhaatu kewal 0.3% tanaav key baad toot gaee.
feel mein varsha kathorta aamtaur parr dou alag-alag prakaar key avakshepon key saath praapt kii jaati haih oxide kann aur carbide. 5 nmvy adharit oxide kanon koo 800 degree celsius taka key tapman parr feel key rengane key pratirodh koo badhaane key liye dikhaaya gayaa haye. isi tarah, ti adharit carbides mein cumm dabaav parr uchch rengane kaa pratirodh dikhaaya gayaa haye, joe varsha koo majboot karane vaale tantra key anuroop haye. jabaki varsha koo majboot karna rengane key pratirodh koo badhaane mein utkrisht haye, uchch tapman parr avakshepan kii sthirata ack seemit kaarak haye. carbides koo feel mein ghulan kiya jaa sakata haye aur oxide kann 1000 degree celsius seey adhik tapman parr motey hoe sakate hain. parinamswarup, 1000 degree celsius seey adhik tapman kii aavashyakta vaale anuprayogon key liye feel mishra dhatuon koo prabhaavi dhang seey majboot naheen kiya gayaa haye aur sambhaavit sanchaalan tapman koo aur badhaane key liye vibhinn ranneetiyon kii aavashyakta hogi. 
upayog karein.
lohe key alumides key sambhaavit upayogon mein shamil hainh vidyut taap tatva, pipe aur uchch tapman prakriya key liye anya kaam jisamen koyla gaisikaran key liye pipe aur superheater aur ree-heater tubes key liye pipe shamil hain. ise chandra upayog key liye ack sanrachanaatmak samagri key roop mein bhee sujhaaya gayaa haye. yaantrik aur okseekaran gunon key achche sanyojan key kaaran, iron aluminide kaa upayog tungsten carbide key liye ack bandhankarta charan key roop mein safaltapurvak kiya gayaa haye. isake alawa, lazer cladding prakriya mein paaramparik doubleu. see.-koo seermets mein cobalt koo feel key saath badalane seey okseekaran aur pahanane key gunon mein sudhaar huaa.

