Si对Ni基非晶合金玻璃形成能力及热稳定性的影响  

Effects of Si Addition on the Glass-Forming Ability and Thermal Stability of Ni-Based Amorphous Alloys

作　　者：梁维中[1,2] 吴林志[2] 毛新宇[1] 

机构地区：[1]黑龙江科技学院,黑龙江哈尔滨150027 [2]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《稀有金属材料与工程》2008年第A04期809-812,共4页Rare Metal Materials and Engineering

基　　金："黑龙江科技学院基金"资助(07-57);中国博士后基金(20070420871);黑龙江省博士后基金(AUGA41001081);黑龙江教育厅基金(11531316);黑龙江自然基金(A200808)

摘　　要：研究Si对NiCuTiZrAl非晶合金的玻璃形成能力及热稳定性的影响。利用铜模铸造制备NiCuTiZrAlSi非晶合金,3.5%Si的添加显著改善非晶合金的玻璃形成能力。在DSC、DTA、XRD及TEM分析的基础上,利用SEM(EDS)技术对类金属Si提高非晶合金的玻璃形成能力及热稳定性进行深入分析。适量元素Si添加不仅可以延缓熔体中初生相Ni(TiZr)和(TiZr)(CuAl)2形成,而且可抑制元素O的有害作用,这为类金属提高非晶合金的玻璃形成能力提供有效证据。利用Kissinger方程进行不同含Si量的NiCuTiZrAl非晶合金晶化动力学研究表明,放热峰Tp处晶化激活能随着Si量增加而增大。Effects of Si addition on the glass-forming ability（GFA） and thermal stability of NiTiZrAlCuSi amorphous alloys were investigated in this paper. Addition of 3.5at%Si effectively improved the glass-forming ability of the studied amorphous alloy. On the base of differential scanning calorimetry （DSC）, differential thermal analysis（DTA）, X-ray diffraction（XRD） and TEM（Transmission electron microscope）, the role of metalloid elements Si in improving GFA and thermal stability of the bulky amorphous alloys was profoundly discussed by way of Scanning electron microscope（SEM） and Energy dispersive scanning（EDS） technique. An addition of a proper amount of Si not only prevented the formation of primary Ni（TiZr） and （TiZr）（CuAl）2 phases in melts but also suppressed the harmful action of O elements in the glass formation, giving a new proof for increment of GFA owing to the existence of Si. The kinetics of crystallization of NiCuTiZrAl amorphous alloys with different Si additions were studied by DSC and the Kissinger equation. The activation energy at the crystallized peak Tp increased with the increase of Si addition.

关 键 词：SI NI基非晶合金 玻璃形成能力 热稳定性 

分 类 号：TG139.8[一般工业技术—材料科学与工程]