The key to this method is to keep porosity intergranular during pre-sintering, so that it can be removed subsequently by HIP treatment.
22.
It was found that agglomerates of closely packed particles are helpful to reach that purpose, since they densify fully and leave only intergranular porosity.
23.
Aluminium-based alloys may be sensitive to intergranular corrosion if there are layers of materials acting as anodes between the aluminium-rich crystals.
24.
It is a purely empirical law attempting to describe ion flow ( mostly sodium and chloride ) in clean, consolidated sands, with varying intergranular porosity.
25.
Components within s Brayton loops suffer from corrosion and erosion, specifically erosion in turbomachinery and recuperative heat exchanger components and intergranular corrosion and pitting in the piping.
26.
The applied isostatic pressure provides additional driving force for densification by substantially increasing the atomic diffusion coefficients, which promotes additional viscous flow at or near grain boundaries and intergranular pores.
27.
Working through ASTM International he was instrumental in standardizing intergranular corrosion tests, including the ferric sulfate-sulfuric acid test now called the " Streicher Test " in his honor.
28.
Several methods have been used to control or minimize the intergranular corrosion of susceptible alloys, particularly of the annealing, quench-annealing or solution-quenching, has been used.
29.
Intergranular corrosion is generally considered to be caused by the segregation of impurities at the grain boundaries or by enrichment or depletion of one of the alloying elements in the grain boundary areas.
30.
They are formed as a glass, and then partially crystallized by heat treatment, producing both amorphous and crystalline phases so that crystalline grains are embedded within a non-crystalline intergranular phase.
