Common MIM Defects and How Powder Properties Affect MIM Performance

🔍 Common MIM Defects and Their Root Causes

1. Cracking During Debinding

Cracking is one of the most frequent defects in MIM.

Possible causes:

• Non-uniform particle size distribution (PSD)

• Poor powder packing density

• Excessive fine particles

These factors affect binder removal behavior and create internal stress.

2. Distortion After Sintering

Dimensional instability is often linked to:

• Irregular powder morphology

• Inconsistent shrinkage behavior

• Oxygen variation in powder batches

Even small powder variations can lead to large deviations in mass production.

3. Poor Surface Finish

Surface defects may result from:

• Satellite particles in atomized powder

• Irregular particle shape

• Binder-powder segregation

4. Mechanical Property Variability

Inconsistent strength or density is often caused by:

• Oxygen and carbon fluctuations

• Batch-to-batch PSD inconsistency

• Powder production instability

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⚙️ Why Powder Matters More Than Process

While process parameters are adjustable, they operate within limits defined by the material system.

If the powder is not optimized for the application:

• process windows become narrow

• stability becomes difficult to achieve

• yield loss increases

This is why many “process problems” are actually material system problems.

🏭 Our Approach to Stable MIM Feedstock

At LIDE, we focus on:

• Controlled particle size distribution (PSD design)

• Low oxygen atomization processes

• High batch-to-batch consistency

• Feedstock systems optimized for industrial production

📩 Conclusion

Understanding the relationship between powder characteristics and MIM defects is essential for improving production stability.

If you are facing cracking, shrinkage, or consistency issues in MIM, it may be worth reviewing the material system, not just the process.

👉 Contact us for technical discussion or sample evaluation.

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