Preparation and properties of TiB2 particles reinforced Cu–Cr matrix composite
Preparation and properties of TiB2 particles reinforced Cu–Cr matrix composite
复制标题
TiB2颗粒增强CuCr基复合材料的制备及性能
DOI：
10.1016/j.msea.2015.07.021
复制
发表时间：
2015-08
期刊：
影响因子：
6.4
通讯作者：
Tingju Li
中科院分区：
文献类型：
--
作者：
Pengchao Zhang;Jinchuan Jie;Yuan Gao;Hang Li;Zhiqiang Cao;Tongmin Wang;Tingju Li
本研究对采用不同熔炼工艺制备的 Cu-0.5Cr-1.5TiB2 复合材料进行了研究。 TiB2 颗粒分散分布的最佳反应温度为 1300 °C，较高的温度不合适，因为溶质元素损失较多。保持时间应为 10 分钟，以使 TiB2 颗粒在基体中表现出相对均匀的分布。为了确保获得所需的化学效果，必须使用氩气屏蔽。基体中观察到典型的等轴对称形貌的TiB2颗粒，而当生长过程受到相邻颗粒的抑制时，会得到形貌不规则的颗粒。时效后，采用最佳熔融工艺制备的复合材料可获得更好的力学性能。强化包括TiB2颗粒的位错堆积机制、Cr颗粒的沉淀强化和应变强化。 TiB2 颗粒略微降低了电导率，这表明界面散射的贡献较小。由于杂质散射急剧下降，老化后电导率表现出明显的增加。
Cu–0.5Cr–1.5TiB2composites prepared by different melting processes were investigated in the present study. The optimum reaction temperature for the dispersed distribution of TiB2particles is 1300 °C and a higher temperature is not appropriate due to the high loss of solute elements. Holding time should be 10 min to make TiB2particles exhibit a relatively homogeneous distribution in the matrix. An argon shield is necessary to ensure obtaining the desired chemistry. The typical TiB2particles with equiaxed and symmetric morphology are observed in the matrix, while particles with irregular morphology are obtained when the growth process is inhibited by adjacent particles. After aging, the better mechanical properties are obtained by composite prepared at the optimum melting process. Strengthening is comprised of a dislocation pile-up mechanism of TiB2particles, precipitation strengthening of Cr particles and strain strengthening. TiB2particles slightly decrease the electrical conductivity, which indicates a minor contribution from interface scattering. The conductivity exhibits an obvious increase after aging because of the sharp decline of impurity scattering.
登录
查看更多内容
影响因子：
4.6
作者：
M. Guo;M. P. Wang
通讯作者：
M. Guo;M. P. Wang
影响因子：
4.5
作者：
R. Markandeya;S. Nagarjuna;D. S. Sarma
通讯作者：
R. Markandeya;S. Nagarjuna;D. S. Sarma
DOI：
10.1016/j.msea.2006.01.068
发表时间：
2006-04
影响因子：
6.4
作者：
D. Lu;Jun Wang;Wei Zeng;Yong Liu;Lei Lu;Bao-de Sun
通讯作者：
D. Lu;Jun Wang;Wei Zeng;Yong Liu;Lei Lu;Bao-de Sun
影响因子：
4.5
作者：
Pengchao Zhang;J. Jie;Hang Li;Tongmin Wang;Tingju Li
通讯作者：
Pengchao Zhang;J. Jie;Hang Li;Tongmin Wang;Tingju Li
DOI：
10.1016/j.msea.2011.07.061
发表时间：
2011-10
影响因子：
6.4
作者：
D. Božić;J. Stašić;J. Ružić;M. Vilotijević;V. Rajkovic
通讯作者：
D. Božić;J. Stašić;J. Ružić;M. Vilotijević;V. Rajkovic