Transitioning from Plastics/Molds to AlSiC (Aluminum Silicon Carbide) machining - CNC vs. Laser? What should we look out for?

Hi everyone,

We are a precision plastic injection molding and mold making factory based in Taiwan.

With the rapid expansion of the semiconductor and high-power electronics sectors here, we are looking to diversify our capabilities and invest in tooling/equipment specifically for AlSiC (Aluminum Silicon Carbide) metal matrix composites (mostly for heat sinks, baseplates, and thermal management components).

Since AlSiC is notoriously abrasive and tough to work with, we’d love to hear from anyone who has hands-on experience manufacturing or machining this material.

A few quick questions for the community:

1. Machining Method: For precise AlSiC component processing, do you mostly rely on conventional CNC machining (with specialized PCD/CVD diamond tooling, ultrasonic assistance, etc.) or Laser micromachining/cutting?
2. Key Challenges: What are the biggest gotchas or hidden pitfalls? (e.g., extreme tool wear, thermal cracking, edge chipping, surface finish issues?)
3. Process Flow: Is it better to shape/form before sintering/infiltration, or rely heavily on post-sintering finish machining?

Any advice, equipment recommendations, or hard-learned lessons would be greatly appreciated! Thanks in advance!