Comparison of thermal shock profiles

  • Thread starter mrajkumar
  • Start date
  • #1
11
0

Main Question or Discussion Point

Could someone help me in comparing 2 different thermal shock test profiles effect on a component. The 2 profiles are varied in deg C /min change and also the dwell time in low and high tempwratures. Any references are highly appreciated. Thank you
 

Answers and Replies

  • #2
berkeman
Mentor
56,853
6,835
Could someone help me in comparing 2 different thermal shock test profiles effect on a component. The 2 profiles are varied in deg C /min change and also the dwell time in low and high tempwratures. Any references are highly appreciated. Thank you
Looks like the profiles did not Upload. Can you try again? Use the UPLOAD button in the lower right of the Edit window to upload PDF or JPEG images... :smile:
 
  • #3
berkeman
Mentor
56,853
6,835
Also, is this for schoolwork?
 
  • #4
11
0
I am trying to compare the thermal shock profiles to understand the severity of each and ways to compare them. This is required to choose a component for my required qualification limit. I've uploaded the profile herewith. Requesting a guidance.
Thermal shock2.jpg
 

Attachments

  • #5
berkeman
Mentor
56,853
6,835
I'm assuming the Temperature is in degrees C and the Time is in minutes? (It's best to always label your axes with units to avoid ambiguity) :smile:

The standard temperature stress profile that I'm familiar with (learned first at Hewlett Packard many years ago) is the STRIFE profile, which uses 10C/minute temperature ramps (hence liquid CO2 cooling is required for the ramps down), along with power cycling during the ramps and after soaking at the extremes of the profile. Using ramps faster than about 10C per minute can cause false failures, depending on how complex your electronics are, and going more slowly than 10C/minute doesn't really help you find all of the design and manufacturing issues that you would like to find in this kind of reliability testing.

The profile that we typically use on medium-size Industrial temperature range products is shown below. The vertical cross-hatched bars show where the power to the UUTs is turned off. We typically also add in some off times during some of the temperature ramps. Are the ramp rates for the faster profile you show in your figure close to 10C/minute?

LTS-20 STRIFE Profile.JPG
 

Attachments

Related Threads on Comparison of thermal shock profiles

Replies
1
Views
649
  • Last Post
Replies
2
Views
7K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
3
Views
4K
  • Last Post
Replies
2
Views
678
Replies
1
Views
532
  • Last Post
Replies
1
Views
4K
Replies
18
Views
4K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
0
Views
5K
Top