稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2009年
z2期
1263-1268
,共6页
王战民%姜东梅%曹喜营%洪彦若%王金相%李再耕
王戰民%薑東梅%曹喜營%洪彥若%王金相%李再耕
왕전민%강동매%조희영%홍언약%왕금상%리재경
纳米SiC%Al_2O_3-SiC-C%浇注料%抗渣性%Alpha-bond
納米SiC%Al_2O_3-SiC-C%澆註料%抗渣性%Alpha-bond
납미SiC%Al_2O_3-SiC-C%요주료%항사성%Alpha-bond
nano Al_2O_3%Al_2O_3-SiC-C%castable%slag resistance%Alpha-bond
以ω(Al_2O_3)＞99.1%的电熔致密刚玉,粒度＜0.074 mm、ω(SiC)＞97%的碳化硅等为主要原料,SiO_2微粉、沥青和Alphabond为添加物,研究了纳米SiC加入量(质量分数,下同)分别为0, 0.5%, 1%, 1.5%和2%时对Alpha-bond结合的Al_2O_3-SiC-C质浇注料的流动值、常规物理性能、高温抗折强度和抗渣性的影响.采用XRD衍射仪和SEM对实验后的试样进行了物相和显微结构分析.结果表明:采用细粉预混法引入纳米SiC,使Al_2O_3-SiC-C质浇注料更为致密;在保持浇注料流动性相当的条件下,纳米SiC加入量增加到2%,浇注料加水量从3.83%增加到4.67%,增幅为22%,说明纳米SiC的引入对浇注料的流动性影响较大;纳米SiC的加入,对浇注料的常温抗折强度和耐压强度影响不大,高温抗折强度在纳米SiC加入量为0.5%时最高,提高幅度为4%;物相分析表明,添加1.0%纳米SiC后的试样中生成的莫来石比不加纳米SiC试样中生成的少,刚玉的量跟不加纳米SiC试样中的相当,SiC的量比不加纳米SiC试样中剩余的多;静态坩埚抗渣实验表明,含纳米SiC的浇注料,在加入1.0%纳米Al_2O_3时,抗渣渗透性得到显著改善,而抗渣侵蚀性变化不明显.
以ω(Al_2O_3)＞99.1%的電鎔緻密剛玉,粒度＜0.074 mm、ω(SiC)＞97%的碳化硅等為主要原料,SiO_2微粉、瀝青和Alphabond為添加物,研究瞭納米SiC加入量(質量分數,下同)分彆為0, 0.5%, 1%, 1.5%和2%時對Alpha-bond結閤的Al_2O_3-SiC-C質澆註料的流動值、常規物理性能、高溫抗摺彊度和抗渣性的影響.採用XRD衍射儀和SEM對實驗後的試樣進行瞭物相和顯微結構分析.結果錶明:採用細粉預混法引入納米SiC,使Al_2O_3-SiC-C質澆註料更為緻密;在保持澆註料流動性相噹的條件下,納米SiC加入量增加到2%,澆註料加水量從3.83%增加到4.67%,增幅為22%,說明納米SiC的引入對澆註料的流動性影響較大;納米SiC的加入,對澆註料的常溫抗摺彊度和耐壓彊度影響不大,高溫抗摺彊度在納米SiC加入量為0.5%時最高,提高幅度為4%;物相分析錶明,添加1.0%納米SiC後的試樣中生成的莫來石比不加納米SiC試樣中生成的少,剛玉的量跟不加納米SiC試樣中的相噹,SiC的量比不加納米SiC試樣中剩餘的多;靜態坩堝抗渣實驗錶明,含納米SiC的澆註料,在加入1.0%納米Al_2O_3時,抗渣滲透性得到顯著改善,而抗渣侵蝕性變化不明顯.
이ω(Al_2O_3)＞99.1%적전용치밀강옥,립도＜0.074 mm、ω(SiC)＞97%적탄화규등위주요원료,SiO_2미분、력청화Alphabond위첨가물,연구료납미SiC가입량(질량분수,하동)분별위0, 0.5%, 1%, 1.5%화2%시대Alpha-bond결합적Al_2O_3-SiC-C질요주료적류동치、상규물이성능、고온항절강도화항사성적영향.채용XRD연사의화SEM대실험후적시양진행료물상화현미결구분석.결과표명:채용세분예혼법인입납미SiC,사Al_2O_3-SiC-C질요주료경위치밀;재보지요주료류동성상당적조건하,납미SiC가입량증가도2%,요주료가수량종3.83%증가도4.67%,증폭위22%,설명납미SiC적인입대요주료적류동성영향교대;납미SiC적가입,대요주료적상온항절강도화내압강도영향불대,고온항절강도재납미SiC가입량위0.5%시최고,제고폭도위4%;물상분석표명,첨가1.0%납미SiC후적시양중생성적막래석비불가납미SiC시양중생성적소,강옥적량근불가납미SiC시양중적상당,SiC적량비불가납미SiC시양중잉여적다;정태감과항사실험표명,함납미SiC적요주료,재가입1.0%납미Al_2O_3시,항사삼투성득도현저개선,이항사침식성변화불명현.
Using dense fused alumina and SiC as main Starting materials, nano SiC, pitch ball and Alphabond as additives, effects of nano SiC addition of 0, 0.5%, 1%, 1.5% and 2% on the flowability, physical properties hot modulus of rupture (MOR) and slay resistance were investigated for the Al pha-bond Al_2O_3-SiC-C castables. Phases and microstructure of samples after experiments were analyzed by XRD and SEM. Results show that introduction of nano SiC to the castables by premixing with fines makes the castables denser; under the certain condition of flow ability, content of nano SiC addition increases to 2%, the water addition increases from 3.83% to 4.67%, by 22%, indicating that introduction of nano SiC has great effect on the flow ability, while it does not influence the cold MOR and hot MOR obviously, and hot MOR is the highest with 0.5% nano SiC addition, increased by 4%, phase composition analysis shows that the mullite form 1.0% nano SiC addition, while SiC residual content is more that that of samples without nano-SiC. Static crubcible slay resistance tests show for the nano-SiC castables with 1.0% nano Al_2O_3, the slag resistance penetration is improved significantly, but slag resistance corrosion changes lightly.
