In this experimental study, three TiB2/Al metal matrix composites (MMCs) with 40 μm in mean size were produced using a melt stirring squeeze casting route. Test was carried out to find the parameters influencing surface roughness (Ra) and material removal rate (MRR) on machining the TiB2 reinforced Al-6063 composite materials. The orthogonal array, the signal-to-noise ratio, and analysis of var...

The actual significance of any definition of toughness behaviour of carbide tools depends on the existence of an interrelation between the auality as defined and the occurrence of chiuninn and uremature failure in cuttin?. V'hile at ?resent there is no ademate analvsis available and the existing classifications do not even nrovide a ?ualitatiVc. indication for tool choice, one first has to eval...

Whiskers of iron carbide encased in carbon shells have been prepared from iron(I1) phthalocyanine. Solid FePc is oxygenated and then thermally treated under H2 flow. With proper control of conditions, Fe3C free from metallic iron can be synthesized. The product was characterized with the help of Mossbauer effect spectroscopy, X-ray diffraction, X-ray absorption, and transmission electron micros...

Ultra-high temperature ceramics are desirable for applications in the hypersonic vehicle, rockets, re-entry spacecraft and defence sectors, but few materials can currently satisfy the associated high temperature ablation requirements. Here we design and fabricate a carbide (Zr0.8Ti0.2C0.74B0.26) coating by reactive melt infiltration and pack cementation onto a C/C composite. It displays superio...

A novel microstructural architecture consisting of Cr23C6 carbide spatial columns was created in solid components of Co-26Cr-6Mo-0.2C fabricated from powder by additive manufacturing using electron beam melting. These columns of carbides extended in the build direction and are formed by the x-y rastering of the electron beam to pre-heat and melt powder layers using CAD models. These microstruct...

The article presents the results of surface hardening tungsten­carbide hard alloys carried out using concentrated energy flows. VK6­OM alloy with a thickness 20 μm is applied to VK10KS by method electric spark treatment. In this case, hardened layer consisting W 2 C obtained. hardness resulting 22,000 MPa and friction coefficient 0.23 (compared original 0.41); strong but insufficiently wear­res...

The high water flow rates observed in carbon nanotubes (CNTs) have previously been attributed to the unfavorable energetic interaction between the liquid and the graphitic walls of the CNTs. This paper reports molecular dynamics simulations of water flow in carbon, boron nitride, and silicon carbide nanotubes that show the effect of the solid-liquid interactions on the fluid flow. Alongside an ...