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- W2083288064 abstract "Abstract In order to clarify the effect of Nb addition on the ductile-brittle transition property of sintered TiC, TiC-10 mol%Nb composites were researched using a three-point bending test at temperatures from room temperature to 2020 K, and thefracture surface was observed by scanning electron microscopy. It was found that the Nb addition decreases the ductile-brittletransition temperature of sintered TiC by 300 K and increases the ductility. The room temperature bending strength wasmaintained at up to 1800 K, but drastically dropped at higher temperatures in pure TiC. The strength increased moderately toa value of 320 MPa at 1600 K in TiC-10 mol% Nb composites, which is 40 % of the room temperature strength. Pores wereobserved in both the grains and the grain boundaries. It can be seen that, as Nb was added, the size of the grain decreased.The ductile-brittle transition temperature in TiC-10 mol% Nb composites was determined to be 1550 K. Above 1970 K,yieldpoint behavior was observed. When the grain boundary and cleavage strengths exceed the yield strength, plasticdeformation is observed at about the same stress level in bending as in compression. The effect of Nb addition is discussedfrom the viewpoint of ability for plastic deformation.Key wordsductile-brittle transition, TiC-Nb, strength, composites, bending test." @default.
- W2083288064 created "2016-06-24" @default.
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- W2083288064 date "2014-01-27" @default.
- W2083288064 modified "2023-09-24" @default.
- W2083288064 title "Ductile-Brittle Transition Property of Sintered TiC-Nb Composites" @default.
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- W2083288064 doi "https://doi.org/10.3740/mrsk.2014.24.1.13" @default.
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