Thermal Shock Impact onC/C and Si Melt Infiltrated C/C Materials (SIMI)

2008 ◽  
pp. 195-203
Author(s):  
Dale E. Wittmer ◽  
Peter Filip
Keyword(s):  
Thermal Shock ◽  
Shock Impact

Automotive optoelectronic components submitted to thermal shock: Impact of component architecture on mechanical reliability

2022 ◽  
Vol 128 ◽  
pp. 114422
Author(s):  
Safa NOCAIRI ◽  
Khalil Maarouf ◽  
Christine Roucoules ◽  
Guillaume Kermouche ◽  
Sergio Sao-Joao ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Mechanical Reliability ◽  
Component Architecture ◽  
Shock Impact

A controller for safe, convenient operation of LaB6 emitters on electron-beam instruments

1983 ◽  
Vol 41 ◽  
pp. 408-409
Author(s):  
W. J. Abramson ◽  
H. W. Estry ◽  
L. F. Allard
Keyword(s):  
Electron Beam ◽  
Control System ◽  
Thermal Shock ◽  
Appropriate Care ◽  
Electron Guns ◽  
Tungsten Filaments ◽  
Order Of Magnitude ◽  
Main Components

LaB6 emitters are becoming increasingly popular as direct replacements for tungsten filaments in the electron guns of modern electron-beam instruments. These emitters offer order of magnitude increases in beam brightness, and, with appropriate care in operation, a corresponding increase in source lifetime. They are, however, an order of magnitude more expensive, and may be easily damaged (by improper vacuum conditions and thermal shock) during saturation/desaturation operations. These operations typically require several minutes of an operator's attention, which becomes tedious and subject to error, particularly since the emitter must be cooled during sample exchanges to minimize damage from random vacuum excursions. We have designed a control system for LaBg emitters which relieves the operator of the necessity for manually controlling the emitter power, minimizes the danger of accidental improper operation, and makes the use of these emitters routine on multi-user instruments.Figure 1 is a block schematic of the main components of the control system, and Figure 2 shows the control box.

Degradation Behavior of TiN Coatings with Different Thicknesses after a Pulsed Laser Thermal Shock Test

2013 ◽  
Vol 51 (10) ◽  
pp. 729-734 ◽  
Author(s):  
Seol Jeon ◽  
Youngkue Choi ◽  
Hyun-Gyoo Shin ◽  
Hyun Park ◽  
Heesoo Lee ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Pulsed Laser ◽  
Thermal Shock Test ◽  
Degradation Behavior ◽  
Shock Test ◽  
Tin Coatings

Structure Evolution of 7YSZ Thermal Barrier Coating During Thermal Shock Testing

2015 ◽  
Vol 30 (12) ◽  
pp. 1261
Author(s):  
ZHANG Xiao-Feng ◽  
ZHOU Ke-Song ◽  
ZHANG Ji-Fu ◽  
ZHANG Yong ◽  
LIU Min ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Thermal Barrier Coating ◽  
Structure Evolution ◽  
Thermal Barrier ◽  
Shock Testing ◽  
Barrier Coating

Influence of the Zinc Sublayer Method Production and Heat Treatment on the Microhardness of the Composite Ni-Al2O3 Coating Deposited on the 5754 Aluminium Alloy

2014 ◽  
Vol 59 (1) ◽  
pp. 355-358
Author(s):  
M. Karaś ◽  
M. Nowak ◽  
M. Opyrchał ◽  
M. Bigaj ◽  
A. Najder
Keyword(s):  
Heat Treatment ◽  
Aluminium Alloy ◽  
Thermal Shock ◽  
Nickel Coating ◽  
Nickel Sulphate ◽  
Al2o3 Coating ◽  
Nickel Coatings ◽  
Watts Bath ◽  
Before And After ◽  
Zinc Interlayer

Abstract In this study, the effect of zinc interlayer on the adhesion of nickel coatings reinforced with micrometric Al2O3 particles was examined. Nickel coating was applied by electroplating on EN AW - 5754 aluminium alloy using Watts bath at a concentration of 150 g/l of nickel sulphate with the addition of 50 g/l of Al2O3. The influence of zinc intermediate coating deposited in single, double and triple layers on the adhesion of nickel coating to aluminium substrate was also studied. The adhesion was measured by the thermal shock technique in accordance with PN-EN ISO 2819. The microhardness of nickel coating before and after heat treatment was additionally tested. It was observed that the number of zinc interlayers applied does not significantly affect the adhesion of nickel which is determined by thermal shock. No defect that occurs after the test, such as delamination, blistering or peeling of the coating was registered. Microhardness of the nickel coatings depends on the heat treatment and the amount of zinc in the interlayer. For both single and double zinc interlayer, the microhardness of the nickel coating containing Al2O3 particles increased after heat treatment, but decreased when a triple zinc interlayer was applied.

THYROTHERM 2799

Alloy Digest ◽  
1992 ◽  
Vol 41 (7) ◽  
Keyword(s):  
Physical Properties ◽  
Surface Treatment ◽  
Thermal Shock ◽  
Tool Steel ◽  
High Resistance ◽  
Heat Treating ◽  
Heat Treat ◽  
Heat Checking ◽  
High Work ◽  
Resistance To Heat

Abstract THYROTHERM 2799 is a maraging tool steel with extremely low heat treat distortion and high resistance to thermal shock and excellent weldability. The alloy also possesses resistance to heat checking a high work temperatures. This datasheet provides information on composition, physical properties, and hardness as well as creep and fatigue. It also includes information on heat treating, machining, joining, and surface treatment. Filing Code: TS-511. Producer or source: Thyssen Specialty Steels Inc..

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