Strengthening of Ti3AlC2 by incorporation of Si to form Ti3Al1 − xSixC2 solid solutions
Strengthening of Ti3AlC2 by incorporation of Si to form Ti3Al1 − xSixC2 solid solutions
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DOI：
10.1016/j.actamat.2005.10.057
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发表时间：
2006-03
期刊：
影响因子：
9.4
通讯作者：
Yanchun Zhou;Jixin X. Chen;Jinbang Wang
中科院分区：
文献类型：
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作者：
Yanchun Zhou;Jixin X. Chen;Jinbang Wang
采用原位热压/固液反应法制备了一系列Ti 3Al 1 − xSixC 2（x ≤ 0.25）固溶体。结果表明，随着Si含量的增加，Ti 3Al 1 − xSixC 2固溶体的晶格参数c急剧下降，但a几乎保持不变。晶格参数c（单位：nm）与Si含量x的关系式为c（x）=1.8541−（8.5674×10−2）x。当x大于0.15时，Ti 3Al 1-xSixC 2固溶体表现出明显的强化效果：Ti3Al0.75Si0.25C2固溶体的硬度、抗弯强度和抗压强度分别提高了26%、12%和29%。Ti 3Al 1 − xSixC 2固溶体的电阻率在0.35-0.37μΩm之间，随Si含量的增加略有增加。在Ti 3AlC 2中加入Si形成固溶体，由于形成了连续的Al 2 O3层，对Ti 3AlC 2的抗氧化性能没有不利影响。
A series of Ti3Al1−xSixC2(x⩽0.25) solid solutions were synthesized using an in situ hot pressing/solid–liquid reaction method. It was revealed that the lattice parameter c decreased dramatically but a remained almost unchanged with an increase of Si in the Ti3Al1−xSixC2solid solutions. A relationship between lattice parameter c (in nm) and Si content x, c(x)=1.8541−(8.5674×10−2)x, was established. A significant strengthening effect was observed when x was greater than 0.15 in the Ti3Al1−xSixC2solid solutions: the Vickers hardness, flexural strength and compressive strength were enhanced by 26%, 12% and 29%, respectively, for Ti3Al0.75Si0.25C2solid solution. The electrical resistivities of Ti3Al1−xSixC2solid solutions were in the range 0.35–0.37μΩm and increased slightly with an increase of Si content. The addition of Si to Ti3AlC2to form solid solutions had no deleterious effect on the oxidation resistance at 1100°C due to the formation of a continuous Al2O3layer.