scholarly journals High temperature diffusion bonding for sintered alumina. 1st report. Size change and deformation in bonding process.

1985 ◽  
Vol 32 (3) ◽  
pp. 85-89
Author(s):  
Tadaaki Sugita ◽  
Kimio Aburaya ◽  
Kanji Ueda
Keyword(s):  
High Temperature ◽  
Diffusion Bonding ◽  
Bonding Process ◽  
Size Change ◽  
Temperature Diffusion

NDE Inspections and Simulation of Defects in Composite-Sintered Bushes

2013 ◽  
Vol 650 ◽  
pp. 582-587
Author(s):  
Kwang Hee Im ◽  
Ki Youl Kim ◽  
Ki Taek Shin ◽  
Han Hee Lee ◽  
To Kang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Carrying Capacity ◽  
Diffusion Bonding ◽  
Manufacturing Process ◽  
High Load ◽  
Load Carrying Capacity ◽  
Heavy Duty ◽  
Temperature Diffusion ◽  
Load Carrying

Bush is one of machine and automobile parts like brake used in drums and hubs in particular. Such bush parts are used for bearings of heavy-duty, large cars requiring wear resistance and high load carrying capacity. High temperature diffusion bonding has been applied for holding the both materials of the bushing together, which are outer steel materials and inner composite-sintered bushings. Therefore, it is very important evaluate the bonding integrity in manufacturing process. A simulation has been performed in order to evaluate the maximum defect sizes. Also, ultrasonic C-scan tests were performed for finding the defect in the composite-sintered bushings with the size of inherent flaws.

Ultrasonic Monitoring of a Low-Temperature Diffusion Bonding Process

2000 ◽  
Vol 28 (2) ◽  
pp. 88 ◽  
Author(s):  
DR Petersen ◽  
RE Link ◽  
Y Greenberg ◽  
D Itzhak ◽  
G Kohn
Keyword(s):  
Low Temperature ◽  
Diffusion Bonding ◽  
Bonding Process ◽  
Ultrasonic Monitoring ◽  
Temperature Diffusion

Mechanical And Microstructural Performance Evaluation Of Diffusion Bonded Alloy 800H For Very High Temperature Nuclear Service

2021 ◽  
pp. 1-29
Author(s):  
Heramb Mahajan ◽  
Lucas Maciel ◽  
Tasnim Hassan
Keyword(s):  
High Temperature ◽  
Diffusion Bonding ◽  
Elevated Temperatures ◽  
Mechanical Response ◽  
Mechanical Performance ◽  
Failure Mechanisms ◽  
Bonding Process ◽  
Atomic Diffusion ◽  
Alloy 800H ◽  
Very High

Abstract Very high temperature reactors (VHTRs) are planned to be operated between 550 to 950°C, and demand a thermally efficient intermediate heat exchanger (IHX) in the heat transport system (HTS). The current technological development of compact heat exchangers (CHXs) for VHTRs is at the ‘proof of concept’ level. A significant development in the CHX technologies is essential for the VHTRs to be efficient, cost-effective, and safe. CHXs have very high thermal efficiency and compactness, making them a prime candidate for IHXs in VHTRs. Photochemically etched plates with the desired channel pattern are stacked and diffusion bonded to fabricate CHXs. All plates are compressed at an elevated temperature over a specified period in the diffusion bonding process, promoting atomic diffusion and grain growth across bond surfaces resulting in a monolithic block. The diffusion bonding process changes the base metal properties, which are unknown for Alloy 800H, a candidate alloy for CHX construction. Hence, developing mechanical response data and understanding failure mechanisms of diffusion bonded Alloy 800H at elevated temperatures is a key step for advancing the technology of IHXs in VHTRs. The ultimate goal of this study is to develop ASME BPVC Section III, Division 5 design rules for CHXs in nuclear service. Towards this goal, mechanical performance and microstructures of diffusion bonded Alloy 800H is investigated through a series of tensile, fatigue, creep, and creep-fatigue tests at temperatures 550 to 760°C. The test results, failure mechanisms, and microstructures of diffusion bonded Alloy 800H is scrutinized and presented.

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