Mechanical properties and material removal characteristics of soft-brittle HgCdTe single crystals

Mechanical properties and material removal characteristics of mercury cadmium telluride (Hg0.84C0.16Te) single crystals were investigated by the use of indentation and single point diamond turning. The nanoindentation tests showed that the average values of elastic modulus and hardness were 40 and 0...

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Bibliographic Details
Published inMaterials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 559; pp. 480 - 485
Main Authors Irwan, R., Huang, H., Zheng, H.Y., Wu, H.
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier B.V 01.01.2013
Elsevier
Subjects
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science; rheology
Elastic modulus
Elasticity, elastic constants
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
Fracture
Hardness
HgCdTe
Indentation
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
Removal
Surface treatments
Removal
Elastic modulus
HgCdTe
Fracture
Hardness
Indentation
Inorganic compounds
Ruptures
Transition element compounds
Nanoindentation
Roughness
Turning
Fracture toughness
Cutting
Monocrystals
II-VI semiconductors
Ductile-brittle transitions
Cadmium Mercury Tellurides Mixed
Fracture toughness test
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Summary:Mechanical properties and material removal characteristics of mercury cadmium telluride (Hg0.84C0.16Te) single crystals were investigated by the use of indentation and single point diamond turning. The nanoindentation tests showed that the average values of elastic modulus and hardness were 40 and 0.55GPa, respectively. The fracture toughness estimated by Vickers indentation fracture toughness test was 0.200MPam1/2, in the predicted range of 0.204–0.235MPam1/2 by the Bifano model. The diamond turning experiments revealed that there was a threshold value in depth of cut that was responsible for the transition from ductile to brittle removal modes during the cutting of the Hg0.84C0.16Te single crystals. The measured critical depth of cut was between 1.5 and 2μm, in agreement with that of 1.541μm calculated by the Bifano model.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2012.08.129