Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.


A substance which augments a melt, usually in the latter part of the melting operation, thus altering the solidification structure of the cast metal, as in grain refinement of aluminum alloys.



a substance added to a metal or alloy in small quantities, causing a significant change in its structure and properties. The effect of such treatment is called inoculation.

According to the classification of P. A. Rebinder, inoculants are divided into two groups. The first group includes surface-active substances, which are adsorbed on the nuclei that form on crystallization centers and retard their growth, resulting in the appearance of a large number of new nuclei, whose growth becomes possible as the concentration of the inoculant on their surfaces decreases.

Inoculants of the second type facilitate the formation of crystallization centers, such as colloidal particles, which affect the nucleation of crystals of the metallic phase during hardening. Upon the appearance of a large number of such centers, there is increased formation of fine granules of the principal phase or fine inclusions of other phases. Phases that otherwise would not be formed in the material sometimes crystallize on such centers.

Inoculants of both groups disintegrate granules (inclusions), but inoculants of the first group enhance the supercooling of melts during crystallization, and those of the second group reduce supercooling.


Rebinder, P. A., and M. S. Lipman. “Fiziko-khimicheskie osnovy modifikatsii metallov i splavov malymi poverkhnostno aktivnymi primesiami.” In Issledovaniia v oblasti prikladnoi fiziko-khimii poverkhnostnykh iavlenii. Moscow-Leningrad, 1936.


References in periodicals archive ?
There are various reports indicating that LAB inoculant did not effect ruminal DM and OM degrabilities or digestibility of silages (Arriola et al.
Some researchers have reported that use of a LAB inoculant increases lactic acid production and decreases silage pH, the acetic acid level, and butyric acid production [25,26].
Plants receiving microbial inoculants containing Azotobacter chroococcum + Bacillus megaterium + Glomus fasciculatum + 75%NP + 100%K + Vermicompost recorded highest number of branches/plant (15.
Proper silage making and use of inoculant (homofermentative type) maintains stability of silage and prevent it from spoilage.
For plant height (Table 2), there was no significant effect in the first cultivation year; however, for the agricultural year of 2012/13, there was interaction between the doses and forms of application of the inoculant containing Azospirillum brasilense.
1] for the treatments inoculated with strains approved as inoculants, such as INPA03-11B, which was well below the yield observed for the same treatment at Dom Pedro (Table 2).
The research and policies supporting sustainable agricultural production have improved the efficiency and quality of microbial inoculants by influencing the creation of the commercial register of several products based on microorganisms; both for biological control as biofertilization with mycorrhizae and PGPR preparations that are commercially available in several countries.
North America accounted for the largest share of the agricultural inoculants market in 2013.
8220;We felt it was in the best interest of cultivators, and their customers to develop a propriety microbial inoculant that fully aligns with standards many of come to expect from VAGMATRIX,” said Mr.