TiN as a high temperature diffusion barrier for arsenic and boron

1984 ◽  
Vol 119 (1) ◽  
pp. 11-21 ◽  
Author(s):  
C.Y. Ting
Keyword(s):  
High Temperature ◽  
Diffusion Barrier ◽  
Temperature Diffusion

Electrodeposited Cobalt-Tungsten as a High-Temperature Diffusion Barrier for Graphite-Fiber/Nickel Composites

1993 ◽  
Vol 318 ◽  
Author(s):  
N. S. Wheeler ◽  
D. S. Lashmore
Keyword(s):  
High Temperature ◽  
Diffusion Barrier ◽  
Alloy Coating ◽  
Matrix Composites ◽  
Graphite Fiber ◽  
Nickel Metal ◽  
Aerospace Applications ◽  
Temperature Diffusion ◽  
Graphite Fibers ◽  
Nickel Composites

ABSTRACTThere is a growing demand for advanced composites which can maintain their structural strength in high-temperature environments, particularly for aerospace applications. The use of graphite fiber/nickel metal matrix composites would be desirable if the deterioration of mechanical properties resulting from interdiffusion of carbon and nickel at temperatures in excess of 600°C could be avoided. The present research concerns an electrodeposited cobalt alloy coating containing 5-10.5 at-% tungsten, which was designed to serve as a diffusion barrier between graphite fibers and a nickel matrix. The resulting graphite/Co-W/Ni composite was tested under various time/temperature conditions, and the coating was shown to inhibit diffusion for up to 24 hr at 800°C. Annealed and unannealed coated fibers were analyzed by x-ray diffraction and by transmission electron microscopy The as-deposited coating was found to contain both h.c.p. and f.c.c. cobalt, whereas only f.c.c. was observed after annealing at 1100°C for 1.5 hours. WC was found at the coating/fiber interface.

scholarly journals Diffusion Barrier Layer For High-temperature Protective Coatings

2016 ◽  
Vol 2016 (4) ◽  
pp. 36-44 ◽  
Author(s):  
K.Yu. Yakovchuk ◽  
◽  
A.V. Mikitchik ◽  
Yu.E. Rudoy ◽  
A.O. Akhtyrsky ◽  
...  
Keyword(s):  
High Temperature ◽  
Barrier Layer ◽  
Diffusion Barrier ◽  
Protective Coatings ◽  
Diffusion Barrier Layer

High-temperature diffusion behavior of ZrC in C matrix and its promotion on graphitization

2016 ◽  
Vol 26 (8) ◽  
pp. 2257-2262 ◽  
Author(s):  
Zhong-wei ZHANG ◽  
Qiang ZHEN ◽  
Feng ZHENG ◽  
Fei LU ◽  
Ce-wen NAN ◽  
...  
Keyword(s):  
High Temperature ◽  
Diffusion Behavior ◽  
Temperature Diffusion
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