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Physical Characteristics of Titanium Carbide Type Cermets at Elevated Temperatures
Author(s) -
KNUDSEN F. P.,
MORELAND R. E.,
GELLER R. F.
Publication year - 1955
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1955.tb14953.x
Subject(s) - cermet , creep , materials science , thermal shock , ultimate tensile strength , carbide , microstructure , metallurgy , composite material , flexural strength , deformation (meteorology) , thermal expansion , titanium , nickel , titanium carbide , ceramic
The principal purpose of this investigation was to determine the creep behavior and strength at 1200° to 1850°F. of cermets which may be used in the high‐temperature areas of aircraft. Initially a series of bending tests was made on variations of Kennametal 150‐type Kentanium containing from 5 to 30% nickel binder. The 5, 15, and 20% compositions were the strongest and the most creep resistant. Because of the need for both thermal and mechanical shock resistance, tensile creep tests were then made on K150‐type Kentanium compositions containing 20, 25, and 30% nickel binder. A limited number of tests also were made on Kennametal composition K162B and on Firth Sterling composition FS‐27. The cermet K162B was the most creep resistant and the strongest. Linear thermal expansion determinations were made on Kennametal compositions K138A, K138, K151, and K151A. Their coefficients of expansion between room temperature and 1205°C. ranged from 8.1 × 10 −6 to 8.6 × 10 −6 per °C. Metallo‐graphic examinations were made of all the tensile‐tested specimens; in general, the test strains were too small to cause any noticeable deformation or changes in microstructure.