Abstract Garnet commonly accommodates high contents of Mn + Y heavy rare earth elements (HREE) that follow Rayleigh fractionation during garnet early growth, with the exception overstepping nucleation (late crystallization owing to reaction overstepping). Because this, as porphyroblasts form mostly in equilibrium surrounding matrix, concentration these continuously decreases towards porphyrobla...

The oxidation resistance of TiC/Ni composites is crucial for its application in high-temperature environment. in-situ are fabricated by reactive sintering method, and the influence TiC particle size on composite studied. increases from 1.54 μm to 2.40 as holding time prolongs 2 h 6 h, due dissolution-reprecipitation mechanism. kinetics with different oxidized at 800 °C 100 obeys parabolic kinet...

Episodic tremor and slow slip (ETS) downdip of the subduction seismogenic zone are poorly understood behaviors seismic cycle. Talc, a common metasomatic mineral at interface, is suggested to host but this hypothesis has not been tested in rock record. We investigate actinolite microstructures from talc-bearing talc-free rocks exhumed depths modern ETS (Pimu'nga/Santa Catalina Island, California...

In this work, the structure formation of powder diamond-containing coatings with Sn-Cu-Co binders during sintering specially-shaped grinding wheels has been studied. The kinetics was studied using diamond-free metallic and samples. Powder components were mixed an organic plasticizer applied on steel workpieces by rolling. Sintering performed in vacuum at 700–820 °C. microstructure, phase compos...

Magnetite is a representative ore mineral found in various deposits. The trace element composition of deposits controlled by several physiochemical factors such as temperature, pressure, and oxygen or sulfur fugacity. chemical behavior Germanium (Ge) distinct different environments. Consequently, the patterns Ge magnetite can be used to infer provenance conditions. This study focuses on from Wu...

Precious metal-free Fe-N-C catalysts efficiently electrocatalyze the oxygen reduction reaction both in acid and alkaline electrolyte. Their stability is however limited acidic medium, but generally accepted to be much higher Herein, by combining advanced electron X-ray based techniques, we provide comprehensive evidence of a Fe dissolution/reprecipitation mechanism, which partially transforms s...