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两相Ag-Y合金在高-低氧压下的高温氧化

牛炎 , 宋尽霞

中国腐蚀与防护学报

研究了含8 mass%Y的Ag-Y合金在105 Pa和10-15 Pa两个氧压于700℃的氧化.结果表 明，在105 Pa的氧化很快，并遵循近似的抛物线规律；10-15 Pa的氧化则很慢且偏 离抛物线规律.在高氧压仅发生Y的原位内氧化，这主要是氧快速向内渗透而没有Y明显地向 外扩散所致；在低氧压则生成含Ag颗粒的Y2O3外氧化层，而其Y的内氧化层则远较高氧 压者薄.内氧化Y2O3颗粒沿深度而变化，近表面处小并呈圆球状，随深度增加逐渐变大 并拉长；在深处呈针状且垂直合金表面.此外，在两种氧压下合金最表面有Ag层或分散的Ag 颗粒生成.

关键词: 两相合金 , oxidation , Ag-8Y

Effect of Tempered Martensite on Magnetomechanical Damping of Ferritic Matrix Dual Phase Alloys

Junsheng LU Xiaodong LIU Wenjie ZHENG Baorong WU Hui BI Central Iron and Steel Research Institute , Beijing , 100081 , ChinaGuijin WANG Dept.of Materials Science and Engineering , University of Pennsylvania , Philadelphia , PA 19104 , USA

材料科学技术（英文）

The influence of the volume fraction of tempered martensite on magnetomechanical damping of the ferritic matrix in dual-phase alloys was studied.The experimental results showed that(1) dual-phase damping alloy is of good combination of strength and toughness: (2)good damping ca- pacity(Q~(-1)≥5.0×10~(-3))can be obtained in dual-phase alloys only when the volume fraction of tempered martensite was controlled properly.The effect of martensite on magnetomechanical damp- ing of the ferritic matrix was analysed.The damping capacity of dual-phase alloys was related to the volume fraction V_m of tempered martensite by Q_~(-1)=Q_~(-1) (1-V_m/1+BV_m)at small vibration strain amplitudes ε_A≤5.0×10~(-6).

关键词: martensite , null , null

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