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Crystal Physics and Engineering Lab
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A lab that crushes tiny pillars to see how crystals deform.
AboutAbout the lab
Revealing what no one has ever seen.
The Crystal Physics and Engineering Lab focuses mainly on structural materials and studies how crystalline materials deform and exhibit their properties.
Using micropillar mechanical testing, a new method, the lab evaluates mechanical properties at scales from the micrometer down to the submicron level.
Using electron microscopes that can image the arrangement of atoms, among other tools, the lab precisely analyzes the structures of crystals and crystal defects.
Based on the findings obtained, the lab aims to create new structural materials with excellent mechanical properties.
Key terms
- Micropillar
- A tiny pillar, on the scale of micrometers, cut out of a material. It is crushed to study how the material deforms
- Dislocation
- A defect in which the arrangement of atoms in a crystal is shifted along a line. It moves when a metal deforms
- Intermetallic compound
- A substance in which two or more metals combine in fixed proportions to form a distinctive crystal structure
NewsLab news
A paper on the plastic deformation of Mg17Al12 single crystals at room temperature was published in Acta Materialia
A paper on micropillar compression of cementite single crystals was published in Acta Materialia
A paper on the defect structure and deformation of μ-phase compound single crystals was published in Acta Materialia
A paper on the deformation of high-purity β-silicon nitride single crystals was published in Journal of the American Ceramic Society
ResearchResearch themes
By combining the evaluation of mechanical properties at very small scales through micropillar mechanical testing with precise analysis of crystal structures and crystal defects using atomic-resolution electron microscopy and other tools, the lab clarifies the mechanisms of deformation and property development in crystalline materials.
*Illustrative imageDeformation mechanisms of hard, complex crystals
Hard phases such as intermetallic compounds with complex crystal structures affect the properties of steel materials and heat-resistant alloys, but how they deform is poorly understood. The lab aims to clarify their properties and deformation mechanisms and to develop new structural materials that make use of hard phases.
*Illustrative imagePushing on tiny pillars to study deformation mechanisms
With micropillar mechanical testing, mechanical properties can be evaluated in single-crystal form even for materials from which large single crystals are difficult to grow, or which easily crack as large bulk samples. The lab has obtained a variety of new findings with this method.
*Illustrative imageSeeing the arrangement of atoms with an electron microscope
Using a state-of-the-art scanning transmission electron microscope with a resolution of about 0.08 nm, the lab directly observes the arrangement of atoms and analyzes the crystal structures of a variety of crystalline materials, as well as the structures of defects such as dislocations, grain boundaries, and boundaries between different phases.
MembersFaculty
- ProfessorKyosuke Kishida
- Assistant ProfessorZhenghao Chen
- Assistant ProfessorLe Li
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Plastic Stress Versus Strain” Mikeviti6 / CC BY-SA 4.0 (cropped)
- Deformation mechanisms of hard, complex crystals: “Cells growing on ceramic crystals” Karen Hing / CC BY-SA 4.0 (cropped)
- Pushing on tiny pillars to study deformation mechanisms: “An indentation in a steel Brinell calibration block, showing slip lines (photo courtesy Foundrax Engineering Products)” GarfieldJAustin / CC BY 4.0 (cropped)
- Seeing the arrangement of atoms with an electron microscope: “Scanning Tunneling Microscope schematic” Michael Schmid and Grzegorz Pietrzak / CC BY-SA 2.0 at (cropped)
- Related lab (Advanced Materials Physics Lab): “Scanning tunneling microscope-MHS 2237-IMG 3819” Rama / CC BY-SA 3.0 fr (cropped)
- Related lab (Materials Design Engineering Lab): “Stone Flower (Кам’яна квітка)” Яна Сычикова, Сергей Ковачев / CC BY-SA 4.0 (cropped)
- Related lab (Physics of Magnetism Lab): “Metal shavings around bar magnet (close-up)” Maciej J. Mrowinski / CC BY-SA 4.0 (cropped)
- Related lab (Functional Construction Lab): “Large sample AFM VEGA” AAMonitor96 / CC BY-SA 3.0 (cropped)
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