Fe-C-Si-B-P-Cr-Mo-Al块体非晶合金的制备与压缩性能  

PREPARATION AND COMPRESSION PROPERTIES OF Fe-C-Si-B-P-Cr-Mo-Al BULK METALLIC GLASS

作　　者：李宏祥 YI Seonghoon 张新房 王晓东 

机构地区：[1]韩国庆北大学校材料科学及冶金系纳米结构材料实验室

出　　处：《金属学报》2006年第7期777-780,共4页Acta Metallurgica Sinica

基　　金：韩国产业资源部超高强度与性能结构金属材料与部件开发基金支持项目~~

摘　　要：采用工业原料通过水冷铜模铸造法制备了直径为5 mm的Fe69C7.0Si3．584．8P9．6Cr2．1Mo2．0Al2．0块体非晶态合金．利用DSC,DTA和XRD对该非晶态合金的热稳定性进行了研究．其玻璃转变温度Tg、过冷液相区△Tx(=Tx-Tg)、约化玻璃转变温度Trg(=Tg／Tl)和玻璃形成能力参数γ(=Tx／(Tg+Tl))分别为784 K,27 K,0．601和0．388．该非晶合金的晶化过程分为两个阶段;首先析出α-Fe相,随后Fe3C,Fe2P,FeB,Fe2B相同时析出．压缩性能测试显示该合金的断裂强度为3870 MPa,Young’s模量为177 GPa,弹性形变为2．1％,塑性形变为0．29％．A new Fe-based bulk metallic glass Fe69C7.0Si3.5B4.8P9.6Cr2.1Mo2.0Al2.0 with maximum diameter of 5 mm was successfully prepared by copper mold casting technique using industrial raw materials. The thermal stability and crystallization behavior were investigated by differential scanning calorimetry （DSC）, differential thermal analysis （DTA） and X-ray diffraction （XRD）. The results showed that the glass transition temperature Tg, supercooled liquid region △Tx（△Tx = Tx -Tg）, reduced glass transition temperature Trg（Trg = Tg/T1） and glass-forming ability parameter γ（γ = Tx/（Tg ＋ T1）） were measured to be 784 K, 27 K, 0.601, 0.388, respectively. The double-stage crystallization process of the amorphous alloy is due to the first precipitation of single α-Fe phase followed by the precipitation of Fe3C, Fe2P, FeB and Fe2B phases simultaneously. The bulk glassy alloy exhibits very high fracture strength of about 3870 MPa, Young＇s modulus （E） of 177 GPa, elastic strain （εe） of 2.1% and plastic strain （εp） of 0.29%.

关 键 词：铁基块体非晶合金 玻璃形成能力 结晶行为 压缩性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]