Indentation resistance of zirconia ceramics and crystals

Gogotsi, G. A.; Ozerskii, B. I.; Ostrovoi, D. Yu.

doi:10.1007/bf02311142

Cited by 2 publications

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the monoliths prepared exhibit the presence of β-SiC, ZrO 2 , BCN, ZrC and some amorphous residual phase, most of them possessing rather modest hardness values. ZrO 2 exhibits a hardness of around 11-13 GPa, 57,58 BCN a hardness of c. 13-16 GPa, 59 ZrC c. 25 GPa 60 and thin films consisting of α-SiC or amorphous SiC were found to have an even lower hardness of 4.4 GPa. 61 It should be noted that dense monolithic SiHfCN and SiHfBCN exhibit hardness values of 26.8 and 24.6 GPa, respectively, as reported recently.…”

Section: Methodsmentioning

confidence: 97%

Monolithic ZrB₂‐based UHTCs using polymer‐derived Si(Zr,B)CN as sintering aid

et al. 2021

View full text Add to dashboard Cite

Ultrahigh temperature ceramics, so-called UHTCs, represent a class of materials that can operate under extreme conditions such as ultra-high temperatures (i.e., beyond 2000℃). [1][2][3] They have been investigated within the context of aerospace, for example, leading edges and control surfaces for atmospheric re-entry, hypersonic flight, and scramjet propulsion or with respect to nuclear power applications such as fuel cladding materials or non-oxidic fuels. 2,[4][5][6] UHTCs are characterized by tremendously high melting points, high hardness, stiffness and strength even at (ultra)high temperatures as well as high thermal conductivity. 7-10 Despite their highly attractive properties, there are still challenges related to the development of UHTCs, for example, concerning their sluggish self-diffusion which impedes their sintering ability, [11][12][13][14][15][16] or their rather fair ultrahigh temperature oxidation/ corrosion resistance. [17][18][19][20][21][22][23] In order to overcome these issues, secondary phases, typically silicon-containing, are considered for the sintering of UHTCs and to additionally provide an improvement of their oxidation behavior. Typically, 10-20 vol.% of silica former phases such as SiC, Si 3 N 4 or metal silicides, for example, MoSi 2 have

show abstract