Nanodiamonds reinforced titanium matrix nanocomposites with network architecture
Nanodiamonds reinforced titanium matrix nanocomposites with network architecture
复制标题
具有网络结构的纳米金刚石增强钛基纳米复合材料
DOI：
10.1016/j.compositesb.2018.11.110
复制
发表时间：
2019-05
期刊：
影响因子：
--
通讯作者：
Liu Tengfei
中科院分区：
文献类型：
--
作者：
Zhang Faming;Liu Tengfei
强度和延展性之间的冲突是金属的重要问题。钛基复合材料（TMC）具有高强度，但通常具有严重的室温脆性。在此，首次实现了 TMC 中纳米金刚石（ND）增强材料的网络分布。对网络结构TMCs的物相、微观结构、力学性能和强化机制进行了系统研究。实验结果表明，增强体在Ti基体中呈网络状分布，网络直径为100~200 μm。纳米复合材料可以获得更高的拉伸屈服强度（σ0.2）和优异的延展性（ε）。网络边界中原位形成的TiC和残余ND起到了增强相的作用，而网络内部基体仍然保持了纯Ti的高延展性。最终，通过纳米增强体的可控空间网络分布，有效地调和了TMCs的强度和延展性之间的矛盾。
The conflict between strength and ductility is vital problem for the metals. Titanium matrix composites (TMCs).have high strength but usually with a severe room temperature brittleness. Herein, a network distribution of.nanodiamond (ND) reinforcements in the TMCs was achieved for the first time. The phases, microstructure,.mechanical properties and strengthening mechanisms of the TMCs with network architectures were systemically.studied. Experimental results showed that the reinforcements had a network distribution in the Ti matrix and the.diameter of networks was 100–200 μm. Higher tensile yield strength (σ0.2) with excellent ductility (ε) can be.obtained in the nanocomposites. The in-situ formed TiC and residual NDs in the network boundary played the.role of reinforcing phases, while the internal matrix of the network still maintained high ductility of the pure Ti..Eventually, the conflicts between strength and ductility of the TMCs have been reconciled effectively by the.controllable spatial network distribution of the nano-reinforcements.
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