Processing, phase evaluation and mechanical properties of MoSi2 doped 4TaC–HfC based UHTCs consolidated by spark plasma sintering
In this research, binary 4TaC–HfC based composites were consolidated using carbide
materials and addition of 0–15 vol.% MoSi 2 by means of spark plasma sintering at 2000° C.
The nearly full dense and monophase specimens were fabricated with a relative density
value higher than 99%. Mechanical tests revealed values of 18–19 GPa and 4–4.3 MPa· m
1/2, for average Vickers hardness and fracture toughness of the composites, respectively.
Analysis of linear shrinkage during densification revealed that MoSi 2 addition increased …
materials and addition of 0–15 vol.% MoSi 2 by means of spark plasma sintering at 2000° C.
The nearly full dense and monophase specimens were fabricated with a relative density
value higher than 99%. Mechanical tests revealed values of 18–19 GPa and 4–4.3 MPa· m
1/2, for average Vickers hardness and fracture toughness of the composites, respectively.
Analysis of linear shrinkage during densification revealed that MoSi 2 addition increased …
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