Engineering dislocation-rich plastic zones in ceramics via room-temperature scratching

Fang, Xufei1,3; Preuss, Oliver1; Breckner, Patrick1; Zhang, Jiawen2; Lu, Wenjun2

2023-04-01

10.1111/jace.19140

JOURNAL OF THE AMERICAN CERAMIC SOCIETY   影响因子和分区

0002-7820

1551-2916

In this communication, we demonstrate a simple but powerful method to engineer dislocations into large plastic zones in various single-crystal ceramic materials via room-temperature scratching. By using a Brinell indenter with a diameter of 2.5 mm, we successfully produced plastic zones with a width and depth of similar to 150 mu m in a single scratch track, while the length of the scratch track can be arbitrarily long depending on the sample size. Increasing the number of repetitive scratching cycles increases the dislocation density up to similar to 10(13) m(-2) without visible crack formation. The outlined experimental procedure is showcased on single-crystal SrTiO3, MgO, ZnS, and CaF2 to demonstrate the general applicability of this technique. In light of the increasing research interest in dislocation-tuned functional and mechanical properties in ceramics, our method will serve as a simple, fast, and robust technique to pave the road for scaling up the required large plastic zones for dislocation engineering in ceramics.

cyclic loading dislocations in ceramics room-temperature plasticity scratching

SCI ; EI

英语

其他

Deutsche Forschungsgemeinschaft[414179371]

Materials Science

Materials Science, Ceramics

WOS:000973554900001

WILEY

20231714004166

Calcium fluoride ; Dislocations (crystals) ; Ductile fracture ; Fluorspar ; II-VI semiconductors ; Magnesia ; Single crystals ; Strontium titanates ; Titanium compounds ; Zinc sulfide

Minerals:482.2 ; Thermodynamics:641.1 ; Semiconducting Materials:712.1 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Crystalline Solids:933.1

MATERIALS SCIENCE

Web of Science

1.Tech Univ Darmstadt, Dept Mat & Earth Sci, Darmstadt, Germany
2.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen, Peoples R China
3.Tech Univ Darmstadt, Dept Mat & Earth Sci, D-64287 Darmstadt, Germany

Fang, Xufei,Preuss, Oliver,Breckner, Patrick,et al. Engineering dislocation-rich plastic zones in ceramics via room-temperature scratching[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2023,106(8):4540-4545.

Fang, Xufei,Preuss, Oliver,Breckner, Patrick,Zhang, Jiawen,&Lu, Wenjun.(2023).Engineering dislocation-rich plastic zones in ceramics via room-temperature scratching.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,106(8),4540-4545.

Fang, Xufei,et al."Engineering dislocation-rich plastic zones in ceramics via room-temperature scratching".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 106.8(2023):4540-4545.