We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Material strength and inelastic deformation of silicon carbide under shock wave compression
Summary
This shock physics study measured the strength and deformation of silicon carbide ceramic under extreme compressive stress, finding it maintains very high shear strength even above its elastic limit. This is a materials engineering study on advanced ceramics under shock loading with no relevance to environmental microplastics.
In-material, lateral, manganin foil gauge measurements were obtained in dense polycrystalline silicon carbide (SiC) shocked to peak longitudinal stresses ranging from 10–24 GPa. The lateral gauge data were analyzed to determine the lateral stresses in the shocked SiC and the results were checked for self-consistency through dynamic two-dimensional computations. Over the stress range examined, the shocked SiC has an extremely high strength: the maximum shear stress supported by the material in the shocked state increases from 4.5 GPa at the Hugoniot elastic limit (HEL) of the material (11.5 GPa) to 7.0 GPa at stresses approximately twice the HEL. The latter value is 3.7% of the shear modulus of the material. The elastic–inelastic transition in the shocked SiC is nearly indistinctive. At stresses beyond twice the HEL, the data suggest a gradual softening with increasing shock compression. The post-HEL material strength evolution resembles neither catastrophic failure due to massive cracking nor classical plasticity response. Stress confinement, inherent in plane shock wave compression, contributes significantly to the observed material response. The results obtained are interpreted qualitatively in terms of an inhomogeneous deformation mechanism involving both in-grain microplasticity and highly confined microfissures.
Sign in to start a discussion.
More Papers Like This
Room temperature deformation of 6H–SiC single crystals investigated by micropillar compression
Researchers studied the deformation of silicon carbide crystals at the microscale, finding that both slip and fracture occur at room temperature under very high stress. This materials science research is unrelated to microplastics but contributes to understanding how materials fragment under mechanical stress.
Brittle materials at high-loading rates: an open area of research
This paper reviews how brittle materials like ceramics, rocks, and concrete behave when subjected to high-speed impacts and explosive loading, identifying knowledge gaps in understanding their fracture behavior. This materials science study is focused on engineering and defense applications and has no direct relevance to microplastics research.
Small-Scale Mechanical Testing of Cemented Carbides from the Micro- to the Nano-Level: A Review
This overview reviews small-scale mechanical testing techniques applied to cemented carbide materials at the micro and nano scale. It is an advanced materials characterization paper unrelated to environmental microplastics.
Winter Annual Meeting of ASME
This engineering paper uses computer simulations to study the deformation behavior of silicon carbide fiber-reinforced titanium metal matrix composites. This aerospace materials study has no connection to microplastics or environmental health.
Shock-wave induced compressive stress on alumina ceramics by laser peening
Researchers applied laser shock peening to alumina ceramics to induce compressive stress and improve their mechanical properties. This is an advanced materials engineering paper unrelated to environmental microplastics.