scholarly journals Critical analysis and innovation propositions to the heat and thermal shock test method of the Brazilian Standard NBR 15575 (2013)

2020 ◽  
Vol 10 (3) ◽  
pp. 364-376
Author(s):  
Luciani Somensi Lorenzi ◽  
Kassio J. Stein ◽  
Luiz Carlos Pinto da Silva Filho
Keyword(s):  
Thermal Shock ◽  
Construction Industry ◽  
Visual Inspection ◽  
Meta Analysis ◽  
Test Method ◽  
Thermal Shock Test ◽  
Shock Test ◽  
Lack Of Information ◽  
Number Of Cycles ◽  
Brazilian Standard

The tests of Brazilian Standard NBR 15575: 2013 are part of the knowledge of the civil construction industry, but the heat and thermal shock test is innovative and does not have a consolidated history. The research objective is to analyze the testing critically and present proposals based on data meta-analysis. Results showed that the test is very inaccurate in describing the procedure and equipment. This study proposed adjustments and innovations in the test to provide more reliable results, but it does not make propositions regarding visual inspection and the number of cycles. The study concluded that the lack of information on the testing has direct responsibility for the results and that the suggested proposals have the potential to be incorporated.

Pyroelectric Effects on 1T-1C Fram and 1Tr Fram

1998 ◽  
Vol 541 ◽  
Author(s):  
In Kyeong Yoo ◽  
I.S. Chung ◽  
C.J. Kim ◽  
J.K. Lee ◽  
B.K. Jeon ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Heating Rate ◽  
Test Method ◽  
Thermal Shock Test ◽  
Polarization Reversal ◽  
Shock Test ◽  
Pyroelectric Effect ◽  
Pzt Film ◽  
In Series ◽  
Flow Through

AbstractPyroelectric effect on ferroelectricity was examined for PZT capacitors with diodes in series. It was observed that the magnitude of the polarization reversal increases as heating rate increases. The polarization reversal begins to decrease as heating rate becomes very high, which may stem from the fact that pyroelectric charges flow through the PZT film at high temperature as the film loses its resistance at the elevated temperature. A pure remanent polarization reversal model is suggested for the polarization reversal caused by pyroelectric charges. Based on the above results, a thermal shock test method is proposed for quality control of FRAM products. The thermal shock test reveals that pyroelectric effect can be minimized by controlling process for 1T-1C FRAM. It was also observed, by the thermal shock test, that imprint dominates pyroelectric effect in 1Tr cell with MFIS structure.

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

Analysis of the electrical characteristics and structure of Cu-Filled TSV with thermal shock test

2014 ◽  
Vol 10 (3) ◽  
pp. 649-653 ◽  
Author(s):  
Il Ho Jeong ◽  
Myong Hoon Roh ◽  
Flora Jung ◽  
Wan Ho Song ◽  
Michael Mayer ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Test ◽  
Electrical Characteristics ◽  
Shock Test

Binding Performance of a Zirconia Framework Material and Veneering Porcelain

2010 ◽  
Vol 177 ◽  
pp. 186-189 ◽  
Author(s):  
Long Quan Shao ◽  
Bin Deng ◽  
Yuan Fu Yi ◽  
Qi Liu ◽  
Wei Wei Zhang ◽  
...  
Keyword(s):  
Bond Strength ◽  
Thermal Shock ◽  
Shear Bond Strength ◽  
Chemical Element ◽  
Radial Crack ◽  
Visual Observation ◽  
Thermal Shock Test ◽  
Cross Sectional ◽  
Shock Test ◽  
Cad Cam

In this study, the binding performance of a Cercon-based zirconia framework material and special Cercon Ceram S zirconia veneering porcelain is discussed. Rectangular 30 mm × 20 mm × 2 mm porcelain blocks were made from zirconia using the CAD/CAM system. The 2 mm veneering porcelain was then sintered onto blocks at a temperature of 850-800°C with a loading speed of l mm/min. The shear bond strength of the interface was tested. Sintering was studied by visual observation, scanning electron microscopy, energy dispersive spectroscopy (EDS), thermal shock test and other methods. Excellent sintering results of the zirconia framework material and veneering porcelain can be achieved. The cross-sectional morphology of the samples, observed by SEM, shows a uniform, fine, and smooth texture for the veneering porcelain, whereas that of the zirconia framework material shows a rough surface with a uniform and compact texture. EDS results indicate that a small amount of A12O3 and SiO2 is present in the zirconia area, and no ZrO2 or Y2O3 is detected in the veneering porcelain area. No interlayer radial crack or flaw is found throughout the entire thermal shock test of the samples at 60-240°C. Thus, the cracking temperature of the samples is pegged at T>240°C. The shear bond strength of the interface is 32.62±5.77 MPa. Chemical element infiltration exists between zirconia and the veneering porcelain, indicating the chemical bond between the two. An excellent match between the Cercon-based zirconia framework and the special veneering porcelain can be achieved, which can satisfy clinical requirements.

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