브레이크 마모입자의 하전 및 자성 특성 분석 Analysis of charge and magnetic characteristics of brake wear particles Abstract The charge and magnetic characteristics of LM (Low-metallic) and NAO (Non-asbestos-organic) brake wear
particles were analyzed. The ratio of charged particles from total particles is about 86% of the LM pad and about
92% of the NAO pad. Number of charge per particle from the NAO pad is also higher than that of the LM pad. The
ratio of magnetic particles from total particles increases with the particle size. The ratio of magnetic particles from
the LM pad is about 15% for the particles with the size of 1 ㎛, and about 74% for ones with 5 ㎛. The ratio from
the NAO pad is about 5% for the particles with the size from 0.5 ㎛ to 2 ㎛, and about 80% for the particles with
5 ㎛. Through the analysis of the components of the two pads with SEM-EDS (Scanning Electron Microscopy -
Energy Dispersive X-ray Spectroscopy), it was found that the LM pad was occupied with more iron fraction than the
NAO pad and that PM2.5-10 was occupied with more iron fraction than PM2.5. The particles smaller than 10 ㎛ (i.e.
PM10) from the LM pad contained about 83% of charged particles, about 43% of magnetic particles, and about 93%
of charged or magnetic particles. PM10 from the NAO pad contained about 88% of charged particles, about 15% of
magnetic particles, and about 89% of charged or magnetic particles.
Key words
brake wear particles, electrostatic precipitator, magnetic collector, APS, SEM-EDS
▶출처 : Particle and Aerosol Research 제 19권 제 2호 |
