材料期刊网

Microstructural Changes of Cu-Ni-Si Alloy during Aging

Qiming DONG , Dongmei ZHAO , Ping LIU , Buxi KANG , Jinliang HUANG

材料科学技术（英文）

Age hardening in Cu-3.2Ni-0.75Si(wt pct) and Cu-1.0Ni-0.25Si (wt pct) alloys from 723 to 823 K is studied. After an incubation period strengthening appears which is due to precipitates in the Cu-1.0Ni-0.25Si (wt pct) alloy. On other hand an immediate increase of the yield strength characterizes the aging of the alloy. This is followed by the regions of constant yield strength and further by a peak. The microstructure of the alloy was studied by, means of transmission electron microscope (TEM) and X-ray diffraction (XRD). Spinodal decomposition takes place followed by nucleation of the ordering coherent (Cu,Ni)3Si particles, further precipitation annealing coherent δ-Ni2Si nucleated within the (Cu,Ni)3Si particle. Any change of the yield strength can be described by an adequate change of the structure in the sample. The nature of the aging curves with a "plateau" is discussed. The formulas of Ashby and Labusch can be used to explain the precipitation.

关键词: Copper alloy , null , null , null , null , null

MicrOstructural Changes of Cu-Ni-Si AllOy during Aging

材料科学技术（英文）

关键词:

快速凝固高强高导铜合金的研究现状及展望

张瑞丰 , 沈宁福

材料科学与工程学报 doi:10.3969/j.issn.1673-2812.2000.04.030

本文综述了快速凝固高强度高导电率铜合金的研究现状，并对将来的发展趋势作了展望。指出，快速凝固铜合金的凝固过程对合金的最终显微组织结构起重要作用，因而，对其进行深入细致的研究具有重要意义。

关键词: 铜合金 , 高导 , 高强 , 快速凝固

Influence of Solid Fraction on Structure of QTi3.5-15/Graghite Slurry

材料科学技术（英文）

关键词:

铜合金在3.5%NaCl+S~(2-)溶液中的腐蚀磨损行为

王吉会 , 姜晓霞 , 李诗卓

中国腐蚀与防护学报

测定了HAl77-2铝黄铜、BFe30-1-1白铜在3.5％NaCI和3.5％NaCI+S~(2-)溶液中的腐蚀速率、腐蚀磨损率和电化学行为;观察了腐蚀磨损后铜合金的微观形貌;研究了腐蚀后样品的表层性能。实验结果表明,S~(2-)的存在加速了铜合金的腐蚀、腐蚀磨损,使E_corr明显负移,i_corr增加;硫离子对铜合金腐蚀磨损的加速作用与腐蚀磨损过程中的硫致脆性有关。

关键词: 铜合金 , Corrosive wear , Sulfide

热处理对多元铜合金硬度和冲击韧性的影响

高化伟

物理测试

文章通过金相﹑X射线衍射（XRD）﹑扫描电镜(SEM/EDS) 及透射电镜（TEM）和力学性能分析方法研究不同热处理工艺对含多元合金元素铜合金硬度和冲击韧性的影响。结果表明：热处理能改变该合金的硬度，而对其冲击韧性影响不大，该合金经500 ℃保温2 h空冷后可获得较高硬度。

关键词: 铜合金 , heat treatment , hardness and impact toughness.