| 41. | Yttria is used as a sintering additive in the production of porous silicon nitride.
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| 42. | Sintering involves consolidating a material by heating, but to temperatures below the melting point.
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| 43. | Part of the firing process includes sintering.
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| 44. | During the sintering process, the nickel diffuses into the tungsten, producing an alloy.
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| 45. | The study of sintering in metallurgy powder-related processes is known as powder metallurgy.
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| 46. | The estimated sintering temperature was 2000 �C.
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| 47. | In the United States, sintering was first patented by Duval d Adrian in 1922.
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| 48. | Magnesium phosphates and calcium phosphates are the examples which have been processed through microwave sintering technique
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| 49. | Especially rare earth metals have been shown to reduce sintering of metal catalysts when alloyed.
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| 50. | These alternative methods, however, still require careful sintering to produce a quality product.
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