Talk:Silicon nitride/GA1

GA Review

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Review in progress. Kbrose (talk) 14:23, 17 June 2009 (UTC)

Note added by second GA reviewer

This GA review template was apparently created by Kbrose on 14:23, 17 June 2009 (UTC), but it was not transcluded onto the article's talkpage Talk:Silicon nitride, nor was the review recorded on Wikipedia:Good article nominations. As there does not appear to have been any progress since 17 June 2009, I'm continuing this review as second reviewer.Pyrotec (talk) 19:31, 12 August 2009 (UTC)

Initial comments

After reading through this article a couple of times, it appears to be at or about the right level for a GA. Interestingly, some in-line citations have been added very recently; I was going to comment about citations (or lack of, in places), but I will leave that until later.

I now intended to go through the article section by section, but leaving the WP:lead until last.Pyrotec (talk) 19:59, 12 August 2009 (UTC)

• History -

• OK: seems to be verifiable as per in-line citations.

• Synthesis -

• The first few reactions are unreferenced, i.e no in-line citations.
• OK it's fairly trivial, but reference 3 should say p.324, or perhaps pp. 324-325. Its p.324 on the google-books link provided.
• I deduce from the "lattice constants" sentence that semiconductor substrates are silicon, perhaps I'm wrong; but why should I need to deduce this - shouldn't the article make this clear?

• This whole section is almost a string of one-sentence paragraphs; and the last two stick out like a "sore thumb".
• I'm not convinced that the one-sentence paragraph on meteorites & mineral belongs in Sythesis; but where else to put it, History perhaps?

• Processing -  Done. Pyrotec (talk) 21:17, 14 August 2009 (UTC)

• I'm not sure I like or even understand "Silicon nitride is difficult to produce as a bulk material because it cannot be heated over 1850 °C due to its dissociation and therefore is difficult to sinter by conventional hot press sintering techniques". I suggest that the first part to expanded to ...dissociated to (silica & nitrogen?). Presummably, sintering is enhanced by going to higher temperatures than 1850 °C, but again this is not made clear in the current paragraph?

• Thank you. All comments are very valid and have been addressed. Most nitrides, including this one, dissociate upon heating into individual components (heating is always conducted in pure nitrogen, otherwise things get much worse, thus no silica). I guess it is because of the stability of N2 molecule. Sintering is achieved using binders and pulsed, transient techniques, not by temperature. Materialscientist (talk) 01:52, 13 August 2009 (UTC)

....to be continued. Pyrotec (talk) 22:18, 12 August 2009 (UTC)

• Crystal structure and properties -

• Appears to be compliant

• Applications -

• Appears to be compliant

• Applications -

Overall summary

GA review – see WP:WIAGA for criteria

1. Is it reasonably well written?

   A. Prose quality:

   B. MoS compliance:

2. Is it factually accurate and verifiable?

   A. References to sources:

   B. Citation of reliable sources where necessary:

   C. No original research:

3. Is it broad in its coverage?

   A. Major aspects:

   B. Focused:

4. Is it neutral?

   Fair representation without bias:

5. Is it stable?

   No edit wars, etc:

6. Does it contain images to illustrate the topic?

   A. Images are copyright tagged, and non-free images have fair use rationales:

   B. Images are provided where possible and appropriate, with suitable captions:

7. Overall:

   Pass or Fail:

Congratulations on the quality of the article. I'm awarding GA status. Pyrotec (talk) 21:17, 14 August 2009 (UTC)