ISSN:
1573-8973
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. Composites with a Ni−Cr matrix are characterized by embrittlement and negligible solution of the tungsten filament. An effective method of slowing down recrystallization of the filament and eliminating pore formation is alloying of the matrix with refractory metals of groups VA and VIA, especially tungsten, and also the use of complex alloys for the matrix such as alloys of the ZhS6K and TsZh24 type. 2. With a cobalt matrix, unlike a nickel matrix, the tungsten filament is embrittled much less, and no acclerated recrystallization occurs. However, the serious drawback of this type of matrix is the intensive solution of the filament during holding at high temperatures. 3. No interlayer of intermediate phase is formed at the interface in a matrix of heat-resistant alloys containing up to ∼0.05% C and 〈4% (Ti+Al) after annealing at 1100° for 1000 h. When the carbon concentration is raised to ∼0.10% an interlayer of carbide phase of the M6C type is formed, and with 〉7% (Ti+Al) a double interlayer of carbide phase and γ' phase. An interlayer of Co7(W, Cr)6 is formed with a cobalt alloy matrix.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00703004
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