Microstructural evolution and mechanical properties of nano-ATZ ceramics by solid solution precipitation
Microstructural evolution and mechanical properties of nano-ATZ ceramics by solid solution precipitation
复制标题
固溶沉淀纳米ATZ陶瓷的微观结构演变和力学性能
DOI：
10.21203/rs.3.rs-607250/v1
复制
发表时间：
2021-06
期刊：
影响因子：
--
通讯作者：
Xiaodong He
中科院分区：
文献类型：
--
作者：
Yongdong Yu;Xudong Liu;Yuchen Yuan;Wanjun Yu;Hang Yin;Zhao Yin;Yongting Zheng;Xiaodong He
以固溶体微粉为原料，采用原位纳米沉淀法制备了高强、高韧、高硬度的氧化铝增韧氧化锆（ATZ）纳米陶瓷。亚微米尺寸的Al2O3（~ 445 nm）和ZrO2（~ 361 nm）颗粒分别含有低密度析出的纳米ZrO2（~ 35 nm）和纳米y4al2o9 （YAM, ~ 87 nm）颗粒，从而实现了具有超细晶内纳米结构的高性能纳米atz陶瓷。亚微晶与其晶面内部纳米颗粒之间存在平行或共晶晶格取向关系，这非常有利于纳米atz陶瓷力学性能的提高。30wt%Al2O3/70wt%ZrO2（3 mol%Y2O3）的断裂韧性和硬度分别达到5.68±0.17 MPa m1/2（单边v形缺口束法，SEVNB）和16.32±0.45 GPa，与3Y-TZP陶瓷相比分别提高了~ 25%和~ 20%。因此，该方法可用于制备含有超细纳米颗粒且al2o3相分布均匀的纳米atz陶瓷。
Alumina toughened zirconia (ATZ) nanoceramics accompanied with high-strength, high-toughness and high-hardness were prepared by in-situ nanoprecipitation from using solid solution micro-powders. The submicron-sized Al2O3(∼445 nm) and ZrO2(∼361 nm) grains contained low-density precipitated nano-ZrO2(∼35 nm) and nano-Y4Al2O9(YAM, ∼87 nm) particles, respectively, making high-performance nano-ATZ ceramics with ultrafine intracrystalline nanostructure yet achieved. There was a parallel or eutectic lattice orientation relationship between the submicrocrystals and its internal nanoparticles of their crystal planes, which is very conducive to the improvement of the mechanical properties of nano-ATZ ceramics. The fracture toughness and hardness of 30wt%Al2O3/70wt%ZrO2(3 mol%Y2O3) can reach up to 5.68 ± 0.17 MPa m1/2(single-edge V-notched beam method, SEVNB) and 16.32 ± 0.45 GPa, respectively, which are improved by ∼25% and ∼20% compared with those of 3Y-TZP ceramics. Therefore, this method can be used to prepare nano-ATZ ceramics contained ultrafine nanoparticles and uniform distribution of Al2O3phases.
登录
查看更多内容
影响因子：
0.6
作者：
G. H. Stewart
通讯作者：
G. H. Stewart
影响因子：
5.7
作者：
Fei Zhang;J. Chevalier;C. Olagnon;B. Meerbeek;J. Vleugels
通讯作者：
Fei Zhang;J. Chevalier;C. Olagnon;B. Meerbeek;J. Vleugels
影响因子：
5.7
作者：
Wei Zhao;J. Cui;Pinggen Rao
通讯作者：
Wei Zhao;J. Cui;Pinggen Rao
影响因子：
4.5
作者：
R. Govila
通讯作者：
R. Govila
影响因子：
3.5
作者：
Li, Shufeng;Izui, Hiroshi;Watanabe, Taku
通讯作者：
Watanabe, Taku