Free Carbon in Silicon Carbide: Why It Matters More Than You Think

Свободный углерод в карбиде кремния: Почему это важнее, чем вы думаете

Free carbon in silicon carbide is a frequently overlooked impurity that causes measurable problems in sintering, electrical performance, refractory durability, and abrasive consistency. This article explains the formation mechanisms, grade-specific thresholds, measurement methods, and procurement practices engineers need to control it effectively.

How Grit Size Affects Surface Finish: A Practical Guide for SiC Abrasive Users

Как размер зерна влияет на качество поверхности: Практическое руководство для пользователей SiC-абразивов

Selecting the wrong grit size for silicon carbide abrasive operations can push components outside dimensional tolerance, initiate fatigue cracking, or force expensive rework. This guide maps SiC grit sizes to achievable Ra values across common engineering materials, outlines correct multi-stage sequencing logic, and identifies the process variables that shift surface finish outcomes in production.

F-Grade vs P-Grade Silicon Carbide: The Standard Behind the Label

Карбид кремния класса F и карбид кремния класса P: Стандарт, стоящий за этикеткой

F-grade and P-grade silicon carbide share the same grit numbers but follow different FEPA standards with meaningfully different particle size tolerances. This article explains the technical distinctions, maps each grade to its correct application, and outlines what procurement teams should verify before accepting a supplier’s grade declaration.

What the SiC Purity Certificate Actually Tells You — and What It Doesn’t

A supplier certificate showing 98.5% SiC purity tells only part of the story — free carbon, polytype ratio, and trace metals below 100 ppm often go unreported yet directly drive refractory failures and sintering defects. This article explains what each analytical method actually measures, which critical parameters standard COAs omit, and what supplementary documentation to require before approving any SiC shipment.