Comparisons of grain size-density trajectory during microwave and conventional sintering of titanium nitride
Comparisons of grain size-density trajectory during microwave and conventional sintering of titanium nitride
复制标题
DOI：
10.1016/j.jallcom.2013.07.159
复制
发表时间：
2013-12
影响因子：
6.2
通讯作者：
D. Demirskyi;D. Agrawal;A. Ragulya
中科院分区：
文献类型：
--
作者：
D. Demirskyi;D. Agrawal;A. Ragulya
广泛的烧结温度和保温时间已经系统地改变，以研究微波和常规烧结过程中氮化钛试样的“相对密度/晶粒尺寸”轨迹。使用简单的“斜坡和保持”方法可以实现具有亚微米晶粒尺寸（使用微波烧结约170 nm，使用常规烧结约240 nm）的完全致密的材料。机械性能的改善，包括增加硬度（从18至20 GPa），断裂韧性（从2.9至3.4 MPa m1/2），观察到由于晶粒细化的情况下，微波烧结。提出了进一步细化晶粒的烧结制度的优化方向。
A broad range of sintering temperatures and hold times had been systematically varied to investigate the “relative density/grain size” trajectories for titanium nitride specimens during microwave and conventional sintering. Fully dense materials with a submicron grain size (around 170 nm using microwave sintering and around 240 nm using conventional sintering) are achievable using the simple “ramp & hold” approach. Improvement of the mechanical properties, including increase in hardness (from 18 to 20 GPa), fracture toughness (from 2.9 to 3.4 MPa m1/2), was observed due to grain refinement in case of microwave sintering. The area for the future optimization for the sintering schedule for further grain refinement has been proposed.