Grain

(redirected from Grain growth)
Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.
Related to Grain growth: Recrystallization, hot working

Grain

A unit of weight equivalent to one 7,000th of one pound.
References in periodicals archive ?
In conventional thermal processes, the material must be kept at temperatures as high as 400[degrees]C for approximately 30 min to achieve similar grain growth. (16)
Reduction effect in the average grain size due to the [Pr.sub.6][O.sub.11]doping has also been verified by other authors in the literature (OLIVEIRA et al., 2003; SAFAEE et al., 2011; SIMOES et al., 2003; WANG et al., 2005; ZHANG et al., 2007) and is also related with the grain growth inhibition caused by the presence of secondary phase precipitates in the grain boundaries.
The high fracture toughness of Ce[O.sub.2]-Y-TZP sample could be attributed to the resistance of the material to crack propagation and also the grain growth [27].
It can be calculated by the linear intercept method that the average WC grain size [d.sub.WC] was about 400 nm and the average mean free path of binder [lambda] was about 20 nm for the sample without SiC nanowhisker, demonstrating that ultrafine WC-Ni cemented carbide was fabricated at 1350[degrees]C by SPS with the assistance of VC and TaC as grain growth inhibitors.
Heat treatment at 800 [degrees]C for different times: 4, 6 and 8 h enhanced the atomic mobility and caused the grain growth to result in a better crystallinity.
Recrystallization and grain growth are mechanisms that alter the microsctructure of a material without necessarily altering the phase.
This is because as extra Se content is used, more Se will vaporize during the selenization process to inhibit the grain growth, then the FWHM value increases, and the relative diffraction intensity of (112) peak decreases.
Hence, the pattern of grain growth was studied in all the three varieties by sampling grains from individual spikelets from mother shoot in three different segments of spike (proximal, middle and distal) and all the bold and small grains from spikelet were grouped separately.
The phenomenon can be explained by the more intensive grain growth of the mechanically activated mixture due to the relatively long heating period (the heat-up rate was 2[degrees]C/min) and holding time.
According to Mikkola, trade secrets abound in the single crystal blade production world because companies don't like to share their proprietary methods of eliminating these grain boundaries and inducing grain growth, a process known as "seeding."
According to Jiang Gaoming, a leading researcher at the Chinese Academy of Sciences, grain growth will not last long if the government fails to take timely and effective measures, as the soil is already too poor to support high-yield crops.
Therefore, for the SMAT sample, the volume fraction of GBs decreases with grain growth along the depth.