Hetero-modulus ceramics (HMC) present the combination of a ceramic matrix with inclusions of a dispersed phase with considerably lower values of Young's modulus, resulting in a material with significantly advanced properties. Densified ´-Si 6-x Al x O x N 8-x based HMC materials, with various volume contents of low-modulus α-BN phase and modifiers such as TiN or ZrO 2 in sialon matrix, were prepared by high-temperature reaction hot-pressing in nitrogen atmosphere. The pristine blend composition for reaction hot-pressing consisted of mixed fine powders of Si, Al, B, Ti nitrides and Al, Zr oxides. Statistical design of 2 5-2 fractional factorial and third-order simplex-grid types was used for the experimental studies to estimate the effects of some technological factors on the densification of hot-pressed products and the property-composition relationships of modified HMC materials.
<p>Ceramic-metal
composite materials prepared by the metal infiltration process have become the
topic of intense research. The interface reaction between ceramic and metal has
an important impact on the mechanical properties of composite materials. This
article, for the first time, studies the interface reaction between BN and Al. Scanning electron microscopy (SEM) and transmission electron
microscopy (TEM) were both employed to study interface reaction. Studies have
shown that there is an intermediate transition interface between metal and
ceramic. The interface reaction between Al and BN produces AlN, and there is no
close connection among AlN particles. The grain size of AlN is about 1~2μm. The
rate order is: Al element > B element > N element.</p>
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.