Optimization of the Sintering Parameters for Materials Manufactured by Powder Injection Molding

Powder Metallurgy and Metal Ceramics - The properties of sintered and heat-treated steels produced from the Catamold 8740 material by powder injection molding were examined. Parts made of the...     

Fracture Features of Low-Alloy Steel Produced by Metal Injection Molding

Powder Metallurgy and Metal Ceramics - In the manufacture of sintered steels by metal injection molding (MIM), typical microstructural defects, such as pores and pore agglomerates, phase structure...     

Mechanical activation of crystallization of amorphous boron and synthesis of Al<Subscript>3</Subscript>Ti under cold isostatic pressing of B–Al–(LaB<Subscript>6</Subscript>–TiB<Subscript>2</Subscript>) powder

The powder mixture consisting of amorphous boron, crystalline aluminum, and a composite material LaB₆–TiB₂ is cold-isostatically-pressed under a pressure of up to 0.6 GPa and then heated to 1000°C. It is found out that almost the entire amount of amorphous boron contained in the mixture has been crystallized and the synthesis of Al₃Ti has been noted, while the crystallization of amorphous boron usually occurs at a temperature of 1500°C.     

Effect of the crystallization kinetic parameters on the structure and properties of a eutectic alloy of the LaB6–TiB2 system

The effect has been studied of the cooling rate and excess of boron on the formation of microstructures of LaB₆–TiB₂ reinforced ceramic composites during centrifugal sputtering in the argon atmosphere and during sputtering of the alloy melt onto a copper substrate in the helium atmosphere. It has been shown that the increase of the cooling rate to 10⁶ deg/s results in a decrease of diameters of composite material fibers to 0.1–0.15 μm. The decrease of the boron concentration from 2 to 1 wt % has been found to lead to an increase of diameters and decrease of the number of the titanium diboride fibers by a factor of 2–3.