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.200, 北京科技大学学报 第29卷 (c) 101 10m 500um 2001m 2112 120 5004m 500m 图2SEM照片:(a)AJ42,(d)AC42:TEM明场像及相应的SAD花样:(b)AH2中离异共晶A1Sr(B=331)和(c)层片状共晶A1Sr(B= 111),(e)AC42中层片共晶MgCa(B=2203): Fig.2 SEM micrographs:(a)AJ42,(d)AC42:TEM bright field images and corresponding SAD patterns:(b)divorced eutectic AlSr (B= 331)and(c)lamellar eutectic Al.Sr (B=11T)in AJ42.(e)lamellar eutectic MgzCa in AC42 (B=7203). b (c) 2110 1120 1122 小片共品 Bs(G0019 10 uim 500μm 200μm 0113 410 10 um 10#m 5001m 图3SEM照片:(a)AJC421,(d)AJC621,(e)AJC721:TEM明场像及相应衍射花样:(b)AC421中层片状共晶MgCa(B=0223),(c) AJC421中盘状A12Ca颗粒相(B=[i10]as∥Ti100]a),()AJC721中粗大的共晶(Mg,A1)2Ca相(B=3031)· Fig.3 SEM micrographs:(a)AJC421.(d)AJC621.(e)AJC721;TEM bright field images and corresponding SAD patterns:(b)lamellar eu- tectic MgzCa (B=0223)in AJC421.(c)plate-shaped AlCa particles (B=[110]cs//[100])in AJC421.(f)coarse eutectic (Mg.Al)2Ca (B=3031)inAC721图2 SEM 照片:(a) AJ42‚(d)AC42;TEM 明场像及相应的 SAD 花样:(b) AJ42中离异共晶 Al4Sr( B=3 -3 -1)和(c)层片状共晶 Al4Sr( B= 111 - )‚(e) AC42中层片共晶 Mg2Ca(B=2 -203). Fig.2 SEM micrographs: (a) AJ42‚(d) AC42;TEM bright field images and corresponding SAD patterns: (b) divorced eutectic Al4Sr (B= 3 -3 -1) and (c) lamellar eutectic Al4Sr (B=111 - ) in AJ42‚(e) lamellar eutectic Mg2Ca in AC42(B=2 -203). 图3 SEM 照片:(a)AJC421‚(d)AJC621‚(e)AJC721;TEM 明场像及相应衍射花样:(b) AJC421中层片状共晶 Mg2Ca( B=02 -23)‚(c) AJC421中盘状 Al2Ca 颗粒相(B=[1 -10]C15∥[1 -100]α)‚(f) AJC721中粗大的共晶(Mg‚Al)2Ca 相(B=303 -1). Fig.3 SEM micrographs: (a) AJC421‚(d) AJC621‚(e) AJC721;TEM bright field images and corresponding SAD patterns: (b) lamellar eu￾tectic Mg2Ca (B=02 -23) in AJC421‚(c) plate-shaped Al2Ca particles (B=[1 -10]C15∥[1 -100]α) in AJC421‚(f) coarse eutectic (Mg‚Al)2Ca (B=303 -1) in AJC721 ·200· 北 京 科 技 大 学 学 报 第29卷
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