High Temperature Bonding Effect of the Room-Temperature-Curing Phosphate Adhesive for C/C Composites

2016 ◽  
Vol 680 ◽  
pp. 179-183 ◽  
Author(s):  
Ming Chao Wang ◽  
Meng Meng Zhuang ◽  
Xin Tao ◽  
Xi Qing Xu ◽  
Hai Tao Geng ◽  
...  
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Thermal Cycling ◽  
Bonding Strength ◽  
Room Temperature ◽  
Temperature Range ◽  
Heat Resistant ◽  
Bonding Effect ◽  
Temperature Shear

A heat-resistant phosphate adhesive was developed for joining and repairing of C/C composites. The high-temperature bonding effect for both cured adhesive and 1300°C-calcined adhesive had been evaluated through testing high-temperature shear strength of corresponding joints. The results showed that the bonding strength of cured adhesive decreased from 7.9 MPa at RT to 0.9 MPa at 1300°C, while that of 1300°C-calcined adhesive could maintain about 4 MPa at temperature range from RT to 700°C and then decreased to 1.7 MPa at 1300°C. Besides, with the increasing thermal cycling times at 1300°C, the high-temperature bonding strength at this temperature could maintain at about 2.3 MPa.

The Strength of Vacuum-Free Diffusion Bonding Joints of Ni-Bi Alloys and ZrO2 Ceramic

2010 ◽  
Vol 160-162 ◽  
pp. 231-234
Author(s):  
Hou Hong Pan ◽  
Ke Jun Wang ◽  
Isao Itoh
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Nickel Alloy ◽  
Diffusion Bonding ◽  
Bonding Strength ◽  
Room Temperature ◽  
Shear Fracture ◽  
Pure Nickel ◽  
Fracture Test ◽  
Free Diffusion

Ni-Bi alloys were selected to bond to ZrO2 ceramic by diffusion bonding at atmosphere for researching their bondability. The Ni-Bi alloys were Ni-xmass%Bi (x=0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0) and ZrO2 ceramic was Z201N. The bonding was carried out at 973 K, 1037 K and 1173 K for 3.6 ks, 5.4 ks, 7.2 ks, 9.0 ks and10.8 ks under the pressure of 2 MPa, 4 MPa, 6 MPa, 8 MPa, 10 MPa and 12 MPa. The bonding strength was examined by the shear fracture test from room temperature to high temperature. The results indicate that pure nickel could be bonded to ZrO2. Adding bismuth into nickel alloy could obviously improved shear strength at room temperature. The optimum content of bismuth was 2%. The shear strength of vacuum-free diffusion bonding joint was higher than that of vacuum diffusion bonding joint. ZrO2/Ni-2Bi joint was bonded at 1173 K for 7.2 ks under 8 MPa, which shear strength was up to 22 MPa until the test temperature of 873 K.

The Mechanisms Analysis of the ACF Bonding Strengths after the High Temperature/ Humidity Environment Test

2007 ◽  
Vol 353-358 ◽  
pp. 2875-2878
Author(s):  
Jun Zhang ◽  
Xu Chen ◽  
Xin Li Wei ◽  
Yong Cheng Lin
Keyword(s):  
High Temperature ◽  
Thermal Cycling ◽  
Bonding Strength ◽  
Interfacial Stresses ◽  
Humidity Condition ◽  
Humidity Environment

The environmental experiments of the thermal cycling (-40~125°C) and the high temperature/humidity (85°C, 85%RH) aging were used to evaluate the reliability of the specimens bonded with ACFs. It was found that the high temperature/humidity was the harshest condition to the ACFs bonding. The DSC testing and interfacial stresses analysis has been done under the high temperature/humidity condition. The mechanisms of the bonding strength decrease were investigated.

High temperature dielectric relaxation anomalies in Ca0.9Nd0.1Ti0.9Al0.1O3−δ single crystals

RSC Advances ◽  
2015 ◽  
Vol 5 (96) ◽  
pp. 78414-78421 ◽  
Author(s):  
G. Murugesan ◽  
R. Nithya ◽  
S. Kalainathan ◽  
Shamima Hussain
Keyword(s):  
High Temperature ◽  
Dielectric Relaxation ◽  
Single Crystals ◽  
Room Temperature ◽  
Dielectric Studies ◽  
Floating Zone ◽  
Temperature Range

We herein report dielectric studies on Ca0.9Nd0.1Ti0.9Al0.1O3−δ single crystals grown by the optical floating zone technique in the temperature range from room temperature to 660 K.

scholarly journals Shear strength behaviour of sand-bentonite mixtures with pumice additivite under high temperature

2020 ◽  
Vol 205 ◽  
pp. 04004
Author(s):  
Esra Güneri ◽  
Yeliz Yükselen Aksoy
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Room Temperature ◽  
Engineering Properties ◽  
Direct Shear ◽  
Test Results ◽  
Soil Behavior ◽  
Shear Tests ◽  
Volume Deformation ◽  
Direct Shear Tests

Depending on increase in the number and type of energy geostructures, studies on the change in soil behavior against heat increase becomes more important. The engineering properties such as permeability, volume deformation of surrounding soils around energy structures mustn’t alter in the presence of heat and thermal cycles. Pumice is a material used in many fields especially for thermal insulation. For that reason, pumice can be used for increasing the resistance of soils in the presence of heat. In this study, the shear strength behavior of sand-bentonite mixtures was investigated with pumice additive under high temperature. In the experiments, 10% and 20% pumice were added to 10% and 20% sand-bentonite mixtures and compaction, direct shear tests were conducted. The direct shear tests were performed both room temperature and under 80°C. The results have shown that the pumice additive increased the shear strength of sand-bentonite mixtures under high temperature when compared the test results under room temperature.

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