Diamond-SiC composites are attractive for improving the catastrophic fracture behaviour of SiC. However, fundamental knowledge is missing about structure this system and mechanism diamond graphitization. We used spark plasma sintering to study diamond-Si-SiC between 1600 2000?C in function nanocrystalline (ND) microcrystalline (MD) addition as well quantity Sibonding phase. Increasing temperatu...

In order to explore the graphitization characteristic differences between vitrinite and inertinite in coal, this study conducted high-temperature thermal simulation experiments (at five temperature points: 1800°C, 2100°C, 2400°C, 2700°C, 3000°C) using inertinite-rich vitrinite-rich samples as precursors. The quantitative comparison for evolution characteristics of their graphite lattice was car...

A transformation of LDPE in highly ordered doped-carbon materials by a simple one-step pyrolysis presence transition metal precursors is proposed. The graphitization, dispersion and CNFs are key factors for the high ORR performance.

Electrochemical oxygen reduction reaction (ORR) represents a crucial cathodic process of different fuel cells. The development highly active and stable noble metal-free ORR electrocatalysts remains as one major challenges. Herein, we report cobalt/nitrogen co-doped porous carbon materials (Co-N-C) originated from well-designed bimetal-organic frameworks (Zn100-xCox-ZIF) efficient in both pH-neu...

We present an overview of accelerator mass spectrometry (AMS) radiocarbon sample preparation and measurements, describing the technical upgrades that now allow us to routinely obtain 0.2–0.3% precision for 1-mg carbon samples. A precision of ~1% on samples with 100 μg of carbon can also be achieved. We have also developed graphitization techniques and AMS procedures for ultra-small samples (dow...

An ethylene-air laminar diffusion flame successfully provided silicon substrates of anodic aluminum oxide (AAO) template with vertically oriented well-aligned carbon nanotubes. Field emission scanning electron microscopy (SEM) showed that open-tipped carbon nanotubes consisting of tube elements with the same length and diameter uniformly coated the template. High-resolution transmission electro...