AgCuZnSn釬料的熱力學特性

AgCuZnSn釬料的熱力學特性Thermodynamics characteristics of AgCuZnSn brazing filler metals

為了揭示AgCuZnSn釬料的熱力學特性，以BAg50CuZn釬料為原材料，采用熔煉合金化方法制備高錫AgCuZnSn釬料。借助差示掃描量熱儀(DSC)測定不同Sn含量AgCuZnSn釬料的熔化溫度，運用熱分析動力學中的非等溫微分法和積分法分析AgCuZnSn釬料的相變熱力學特性。利用熱力學熵的概念，提出AgCuZnSn釬料釬焊工藝熵和接頭性能熵的數(shù)學表達式。結果表明：隨著Sn含量升高，AgCuZnSn釬料的吸熱峰向左偏移，且在吸熱峰釬料相變溫度區(qū)間變窄。非等溫微分法和積分法得到的AgCuZnSn釬料的相變活化能隨著Sn含量增加逐漸增大；當Sn含量相同時，兩種方法得到的釬料相變活化能幾乎相同。當Sn含量為7.2%(質量分數(shù))時，AgCuZnSn釬料的相變活化能和指前因子值最大，分別為364.46 kJ/mol和7.29×1020。試驗結果證實了釬焊工藝熵和接頭性能熵的表達式在一定程度上可定量表征AgCuZnSn釬料的釬焊性能。

By revealing the thermodynamic properties of AgCuZnSn brazing alloys, brazing alloys of high Sn content were prepared using melting alloyed method based on BAg50CuZn substrate. The melting temperature of brazing alloys was observed by differential scanning calorimeter (DSC), and its phase transformation thermodynamic characteristic was analyzed with the thermal analysis kinetics of non-isothermal differential and integral methods. The mathematical expression of process entropy and performance entropy of brazing alloys were proposed. The results show that the DSC endothermic peak of AgCuZnSn brazing alloys shifts to the left, and its phase transformation temperature interval would be narrower with the increase of Sn content. The phase transition activation energy of AgCuZnSn brazing alloys gradually increases using non-isothermal methods. Under the same Sn content, the phase transition activation energy of brazing alloys with non-isothermal differential method is exactly the same as that of integral method. When Sn content is 7.2% (mass fraction), the transition activation energy and pre-exponential factor of brazing alloys reach the maximum, which are 364.46 kJ/mol and 7.29×1020, respectively. The results indicate that the expression of process entropy and performance entropy could quantitative analyze the brazability of AgCuZnSn brazing alloys.

全文下載：https://pan.baidu.com/s/1SI6-r82B7O9atDpXA7UgcA?

作為值得信賴的合作伙伴和高品質金屬合金的半成品供應商，通項公司擁有完善的服務體系和專業(yè)的團隊。在同客戶交易的過程中，我們力求根據(jù)不同的應用需求將我們的產(chǎn)品做到精益求精。針對當前和未來的市場需求，通項公司致力于為客戶提供最佳的金屬材料解決方案。

TXCO has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. TXCO develops the best alloy material solutions for current and future challenges.

獲取更多我們供應的產(chǎn)品和服務信息，請致電086-021-6786 0205或發(fā)電子郵件service@sinoav.com聯(lián)系我們，您也可以通過微信，微博，領英，臉書，推特和谷歌+與我們互動。

For more information on the products and services that we supply, call us at 086-021-6786 0205 or email us at service@sinoav.com. You can also get in touch on social media, we are constantly active on Weixin, Weibo, LinkedIn, Facebook, Twitter and Google+.