High shock resistance and self-healing ability of graphene/nanotwinned Cu nanolayered composites

2021 ◽  
Vol 860 ◽  
pp. 158435
Author(s):  
Che Zhang ◽  
Ajit Godbole ◽  
Guillaume Michal ◽  
Cheng Lu
Keyword(s):  
Self Healing ◽  
High Shock ◽  
Shock Resistance

SIMOCH

Alloy Digest ◽  
1966 ◽  
Vol 15 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Impact Strength ◽  
Cold Work ◽  
Heat Treating ◽  
High Impact ◽  
High Shock ◽  
Alloy Tool ◽  
High Impact Strength ◽  
Shock Resistance

Abstract SIMOCH is a low alloy tool steel having high shock resistance, high impact strength and excellent wear resistance. It is recommended for many hot work and cold work applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-186. Producer or source: Teledyne Vasco.

CRUCIBLE S7

Alloy Digest ◽  
1996 ◽  
Vol 45 (7) ◽  
Keyword(s):  
Heat Treatment ◽  
Fracture Toughness ◽  
Physical Properties ◽  
Tool Steel ◽  
Cold Work ◽  
Heat Treating ◽  
High Shock ◽  
Unusual Combination ◽  
Versatile Tool ◽  
Shock Resistance

Abstract Crucible S7 is a chromium/molybdenum tool steel developed to produce the unusual combination of high shock resistance and toughness together with ease of machining and heat treatment. It is a versatile tool steel applicable for both hot and cold work shock applications. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on heat treating, machining, and joining. Filing Code: TS-543. Producer or source: Crucible Service Centers.

scholarly journals Design and Implementation of a Dual-Mass MEMS Gyroscope with High Shock Resistance

Sensors ◽  
2018 ◽  
Vol 18 (4) ◽  
pp. 1037 ◽  
Author(s):  
Yang Gao ◽  
Libin Huang ◽  
Xukai Ding ◽  
Hongsheng Li
Keyword(s):  
Mems Gyroscope ◽  
Design And Implementation ◽  
High Shock ◽  
Shock Resistance

Improvement on Thermal Shock Resistance of Ceramic Components by Using Self-Healing

2010 ◽  
Author(s):  
Wataru Nakao
Keyword(s):  
Thermal Stress ◽  
High Temperature ◽  
Thermal Shock ◽  
Stress Fracture ◽  
Thermal Shock Resistance ◽  
Self Healing ◽  
Quenching Rate ◽  
Ceramic Components ◽  
Shock Resistance ◽  
Quenching Method

Availability of self-healing on the thermal shock resistance of ceramic components was investigated. Using gas quenching method, the crack-healed alumina-18 vol% SiC composite, which has excellent self-healing ability, was applied to thermal shock of the arbitrary quenching rate. The procedure could give rise to the thermal stress fracture at high temperature. The critical quenching rate at thermal stress fracture of the healed specimen was found to be 6.47 K/s, corresponding to the thermal stress of 452.3 MPa. Alternatively, that of the cracked specimen was found to be 5.02 K/s, corresponding to the thermal stress of 350 MPa. From the obtained results, usage of self-healing was confirmed to improve extremely thermal shock resistance. The present result suggests that usage of self-healing gives a large advantage to design the high temperature ceramic components, because the mechanically reliable design and thermal shock resistance cannot coexist due to low thermal conductivity.

Fabrication of Self-Healing Ceramic Coating Against Oxidation for Carbon/Carbon Composite Using Polysilazane and Fillers

2009 ◽  
Vol 79-82 ◽  
pp. 775-778 ◽  
Author(s):  
Hong Li Liu ◽  
Chun Ying Tian
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Loss Rate ◽  
Ceramic Coating ◽  
Carbon Composite ◽  
Self Healing ◽  
Weight Loss Rate ◽  
Shock Resistance ◽  
Polymer Pyrolysis ◽  
Sealing Layer

The self-healing ceramic coating against oxidation for carbon/carbon composite was fabricated via preceramic polymer pyrolysis process using polysilazane as preceramic and MoSi2, B4C powders as fillers. By means of SEM and XRD, the phase compose and microstructure of coating were characterized, and preliminarily study on its anti-oxidation ability and thermal shock resistance were conducted. The results showed that, the coating is composed of the resisting oxidation layer and the sealing layer. The thickness of the coating is about 50μm, and the coating is uniform and densified. Good contact at the interfaces is visible on the SEM photograph. At 1300°C temperature, the thermal shock resistance test was conducted 50 times, the weight loss rate was 2.12%. In range of 1200°C~1500°C, the anti oxidation ability of the coating is good.

LATROBE AGT Vac-Arc

Alloy Digest ◽  
1962 ◽  
Vol 11 (6) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Molybdenum Alloy ◽  
Case Hardening ◽  
Steel Company ◽  
High Shock ◽  
Shock Resistance ◽  
Case Hardening Steel

Abstract Latrobe AGT Vac-Arc is a chromium-nickel-molybdenum alloy case hardening steel of superior cleanliness and uniform quality, recommended where high tensile and fatigue strengths are required with high shock resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-130. Producer or source: Latrobe Steel Company.

Design and fabrication of a micromachined gyroscope with high shock resistance

2013 ◽  
Vol 20 (1) ◽  
pp. 137-144 ◽  
Author(s):  
Jian Zhou ◽  
Tao Jiang ◽  
Ji-wei Jiao ◽  
Ming Wu
Keyword(s):  
High Shock ◽  
Shock Resistance ◽  
Micromachined Gyroscope

Evaluation of Thermal Shock Influence on Cordierite Using Impulse Excitation Technique and Dynamic Mechanical Analysis

2016 ◽  
Vol 721 ◽  
pp. 306-310 ◽  
Author(s):  
Maris Rundans ◽  
Ingunda Sperberga
Keyword(s):  
Elastic Modulus ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Glassy Phase ◽  
Mechanical Analysis ◽  
Self Healing ◽  
Mechanical Fatigue ◽  
Cordierite Ceramic ◽  
Impulse Excitation ◽  
Shock Resistance

Mechanical fatigue due to repeated thermal shock cycling is of great importance for most materials intended for refractory applications. This work explores thermal shock resistance and cyclic thermal shock effects of cordierite ceramic made from clay-containing mixtures. Different means of detection of change in modulus of elasticity have been employed including impulse excitation and dynamic-mechanic tests (DMA). Results have shown that the elastic modulus of cordierite ceramic gradually decreases over thermal shock cycles, the sharpest change being observed after the first cycle. Unlike synthetic cordierite ceramic material, clay-substituted cordierite composites show "self-healing" effect, which can be explained by the gradual filling of cracks with glassy phase that leads to the strengthening of the whole structure of material. This effect is directly dependent upon the composition of the sample and the material with lesser amount of glassy phase can be characterized with the largest inertia of this effect.

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