Ubushushu bokuphinda kusetyenziswe i-lanthanum-doped molybdenum wire buphezulu kunobo bucocekileyo be-molybdenum wire, kwaye kungenxa yokuba inani elincinci le-La2O3 linokuphucula iipropati kunye nolwakhiwo lwe-molybdenum wire. Ngaphandle koko, isiphumo sesigaba sesibini se-La2O3 sinokunyusa amandla obushushu begumbi le-molybdenum wire kwaye siphucule ukubuthathaka kobushushu begumbi emva kokuphinda kusetyenziswe i-crystallization.
Uthelekiso lobushushu bokuphinda kusetyenziswe i-Recrystallization: Isakhiwo se-microstructure ye-molybdenum wire ecocekileyo ngokucacileyo sandisiwe kwi-900 ℃ saza saphinda sisetyenziswe kwi-1000 ℃. Njengoko ubushushu bokuphinda kusetyenziswe i-annealing bunyuka, iinkozo zokuphinda kusetyenziswe i-recrystallization nazo ziyanda, kwaye izicubu ezine-fibrous ziyancipha kakhulu. Xa ubushushu bokuphinda kusetyenziswe i-annealing bufikelela kwi-1200 ℃, i-molybdenum wire iphinda isetyenziswe ngokupheleleyo, kwaye i-microstructure yayo ibonisa iinkozo zokuphinda kusetyenziswe i-recrystallization ezifanayo ngokulinganayo. Njengoko ubushushu busanda, iinkozo zikhula ngokungalinganiyo kwaye zibonakala ziinkozo ezirhabaxa. Xa iphinda isetyenziswa kwi-1500 ℃, i-molybdenum wire kulula ukuyiqhekeza, kwaye isakhiwo sayo sibonisa iinkozo ezirhabaxa ezifanayo. Isakhiwo se-fiber ye-lanthanum-doped molybdenum wire sandisiwe emva kokuba iphinda isetyenziswa kwi-1300 ℃, kwaye imo efana namazinyo yabonakala kumda we-fiber. Kwi-1400 ℃, iinkozo zokuphinda kusetyenziswe i-recrystallization zavela. Kwi-1500 ℃, ubume befayibha buyehla kakhulu, kwaye isakhiwo esenziwe ngokutsha sabonakala ngokucacileyo, kwaye iinkozo zakhula ngokungalinganiyo. Ubushushu bokwenziwa ngokutsha kwentambo ye-molybdenum efakwe i-lanthanum buphezulu kunobo bentambo ye-molybdenum ecocekileyo, ebangelwa ikakhulu yimpembelelo yamasuntswana esigaba sesibini se-La2O3. Isigaba sesibini se-La2O3 sithintela ukufuduka kwemida yengqolowa kunye nokukhula kwengqolowa, ngaloo ndlela kwandisa ubushushu bokwenziwa ngokutsha.
Uthelekiso lweePropati zoMbane zoBushushu beGumbi: Ukwandiswa kwentambo ye-molybdenum ecocekileyo kuyanda xa ubushushu be-annealing busanda. Xa ubushushu be-anneal bufikelela kwi-1200 ℃, ukwandiswa kufikelela kwixabiso eliphezulu. Ukwandiswa kuncipha xa ubushushu be-anneal busanda. I-Annealed kwi-1500 ℃, kwaye ukwandiswa kwayo kuphantse kulingane no-zero. Ukwandiswa kwentambo ye-molybdenum efakwe i-La-doped kufana nentambo ye-molybdenum ecocekileyo, kwaye izinga lokwandiswa lifikelela kwiqondo eliphezulu xa i-annealed kwi-1200 ℃. Kwaye emva koko ukwandiswa kwehla xa ubushushu busanda. Okwahlukileyo kuphela kukuba izinga lokunciphisa licotha. Nangona ukwandiswa kwentambo ye-molybdenum efakwe i-lanthanum kuncitshiswa emva kokwandiswa kwi-1200 ℃, ukwandiswa kuphezulu kunentambo ye-molybdenum ecocekileyo.
Ixesha lokuthumela: Disemba-19-2021