GB/T 41736-2022 in English

Material properties and technical specifications

High volume fraction silicon carbide particle aluminum-based composite material combines SiC particles (volume fraction ≥45%) with an aluminum alloy matrix through precision composite molding technology, and has the characteristics of high thermal conductivity (≥160W/(m·K)), low expansion (6.0-11.2×10^-6/℃) and excellent bending strength (≥320MPa).

Comparison analysis of standard frameworks

In-depth interpretation of key test indicators

Key points for thermal parameter determination

• The thermal conductivity test adopts the transient plane heat source method, and the accuracy must reach ±3%
• The linear expansion coefficient measurement range is 25-100℃, and it is recommended to use a quartz push rod expansion meter

Standard evolution and technology iteration

Compared with the traditional GB/T3190 aluminum alloy standard, the new material increases the SiC addition to 45%-65%, and controls the porosity to <0.5% through the innovative process of powder metallurgy + hot isostatic pressing. Verified by a Shanghai research institute, the thermal matching coefficient Δα between the matrix and the particles has dropped from 3×10^-6/℃ to 0.8×10^-6/℃.

Material application implementation suggestions