摘要
通过利用国产DS6×800T铰链式六面顶压机装置高温高压烧结了纳米结构的碳化钽样品,研究和表征了纳米结构碳化钽在超高压力下的物性行为。样品在3 GPa/1 500℃下进行烧结,其相对密度为93%。实验结果表明超高压力更有利于样品的致密化,并且可以降低烧结温度。通过烧结实验,得到了纳米结构碳化钽在压力为3 GPa时的维氏硬度为17.2 GPa,平均断裂韧度为(5.0±0.2)MPa m1/2。
Mechanical properties of nanostructured TaC samples were investigated at ultrahigh pres- sure sintering by using DS6 × 8 MN cubic press device. The samples were sintered at 3 GPa and 1 500℃. The relative density of TaC powders at 3 GPa and 1 500 ℃ is 93%. We found that the ul- trahigh pressure can assist densification and reduce the sintering temperature. The Vickers hardness of the nanostructured TaC at pressure of 3 GPa is 17.2 GPa. The averaged fracture toughness is （5.0 ± 0.2） MPa m1/2
出处
《青海大学学报（自然科学版）》
2014年第1期53-56,共4页
Journal of Qinghai University(Natural Science)
关键词
超高压力
纳米结构
维氏硬度
断裂韧度
ultrahigh pressure
Nano-structure
Vickers harnesses
fracture toughness
