Vim li cas tungsten brittle thiab tantalum tawv?

tungsten thiab tantalum yog ob qho tib si refractory hlau, tab sis muaj qee qhov sib txawv ntawm lawv cov khoom, feem ntau ntawm toughness thiab brittleness. Tungsten feem ntau qhia tau hais tias brittleness, thaum tantalum muaj zoo toughness. Ua ntej, peb yuav tsum to taub cov ntsiab lus ntawm toughness thiab brittleness. Toughness yog hais txog lub peev xwm ntawm cov khoom siv los nqus lub zog thiab tiv thaiv kev puas tsuaj thaum raug rau sab nraud quab yuam, thaum brittleness yog hais txog cov khoom ntawm cov khoom tawg sai sai thaum raug quab yuam. Tungsten nthuav tawm brittleness vim hais tias cov qauv ntawm nws cov muaju yog nruj nreem kaw nrog muaj zog inter-atomic sib cuam tshuam rog, uas ua rau nws susceptibility rau nkig tawg thaum raug rau sab nraud rog. Tsis tas li ntawd, tungsten muaj qhov kub siab heev ntawm 3410 degree, uas txhais tau hais tias ntawm qhov kub siab heev, kev sib cuam tshuam ntawm tungsten tseem muaj zog, ntxiv dag zog rau nws cov brittleness. Tantalum, txawm li cas los xij, yog cov ductile ntau dua vim nws cov qauv qhib siv lead ua thiab tsis muaj zog sib cuam tshuam sib cuam tshuam. Qhov no tso cai rau Tantalum tiv thaiv kev puas tsuaj thaum raug rau sab nraud los ntawm kev nqus lub zog los ntawm kev sib txheeb ntawm cov atoms. Tsis tas li ntawd, lub melting point ntawm tantalum kuj yog siab dua, ncav cuag 2996 degree, uas kuj txhim khu nws interatomic sib cuam tshuam quab yuam, tab sis piv nrog tungsten, tantalum lub interatomic sib cuam tshuam quab yuam yog kuj tsis muaj zog, yog li nws pom zoo toughness. Hauv cov ntsiab lus, qhov sib txawv ntawm tungsten thiab tantalum nyob rau hauv cov nqe lus ntawm toughness thiab brittleness yog feem ntau muaj feem xyuam rau lawv cov qauv siv lead ua thiab interatomic sib cuam tshuam rog. Vim yog cov khoom sib txawv ntawm qhov sib txawv, tungsten thiab tantalum txhua tus muaj lawv cov kev siv tshwj xeeb hauv kev siv tswv yim. Piv txwv li, tungsten yog siv dav hauv kev tsim cov filaments thiab cov khoom siv hluav taws xob vim nws qhov siab melting point thiab hardness, thaum tantalum yog dav siv nyob rau hauv kev tsim cov capacitors thiab electrodes vim nws zoo corrosion kuj thiab hluav taws xob zog.