101 AM Small Impellers

Ceramic Solutions: Additive Manufacturing High-Quality Silicon Nitride Components

Technical ceramics possess numerous properties that make them attractive engineering solutions for challenging applications. They largely outperform industrial-grade polymers and metals for high-temperature operation, with comprehensively superior mechanical properties and thermodynamic stability. Ceramic solutions are currently utilised in industries as varied as aerospace and defence, automotive engineering, chemicals and petrochemicals manufacturing, energy generation, and molten metal handling.Continue reading

Outlining Diamond Grinding of Ceramics

Advanced ceramics manufacturing comprises three essential stages: raw powder processing; forming; and sintering. This generally describes the process of consolidating a powder-based feedstock and firing the green body to achieve a fully-densified technical ceramic. Net shapes with comparatively loose dimensional tolerances (~1-3%) can typically be produced ‘as-sintered’; requiring no machining or finishing prior to quality assurance inspections. Components with tight tolerances cannot be produced ‘as-sintered’ and may require diamond grinding to ensure that the net shape is usable according to the design intent.Continue reading

Syalon 101 Extrusion Dies for Copper, Brass, and Nimonic Alloys

Extrusion describes the process where a metal such as copper or brass is forced through an extrusion die with a smaller cross-section. This deforms the material, causing a lengthening of its granular structure and forcing it to adopt a new cross-section uniformly across the entire manufactured workpiece. It is an extremely common metal forming process used to convert cylindrical billets into hollow tubes, or more complex profiles and sections.Continue reading

Ceramic Materials in Defence Applications

The 20th Century was an era of rapid innovation in ballistics technology, and subsequently in how conflicts were conducted. Military organisations worldwide opted to improve the manouverability of troops and vehicles without compromising the performance of protective equipment in response to high velocity impacts. This led to the gradual adoption of novel ceramic materials in defence applications.Continue reading

Benefits of Silicon Nitride Milling Media

Grinding of industrial intermediates and various analytical samples is carried out by applying continuous abrasive force to reduce the size of particles, or to blend heterogeneous materials together. This can be carried out with hydraulic and pneumatic systems, but one of the oldest methods of grinding involves the use of milling media to repeatedly impact material and cause particles to decompose through mechanical attrition.Continue reading

Molten Aluminium Degassing using Sialon

Aluminium (Al) and its alloys are susceptible to a unique form of chemical corrosion known as hydrogen-induced cracking, which is caused by gradual diffusion of hydrogen (H) molecules through the metal’s crystal lattice. This creates a localised flaw within the alloy that can significantly impair both its tensile strength and ductility, thus increasing the risk of surface fracture. While solid, the hydrogen solubility of aluminium is negligible. Molten aluminium, however, is an incredibly reactive substance that actively decomposes moisture to produce hydrogen (H).Continue reading