原位反應浸滲法制備(B4Cp+Tip)混雜增強Mg及AZ91D復合材料及其阻尼性能

原位反應浸滲法制備(B4Cp+Tip)混雜增強Mg及AZ91D復合材料及其阻尼性能DAMPING CAPACITIES OF (B4Cp+Tip) HYBRID REINFORCED Mg AND AZ91D COMPOSITES PROCESSED BY IN SITU REACTIVE INFILTRATION TECHNIQUE

針對B4C/Ti體系潤濕性較差導致復合效率低下的問題，加入高熔點、不互熔金屬Ti顆粒來改善該體系的潤濕性，并成功利用原位反應浸滲法實現(xiàn)(B4C+Ti)/Mg和(B4C+Ti)/AZ91D復合材料的高效、低成本制備。對制備的(B4C+Ti)/Mg和(B4C+Ti)/AZ91D復合材料的微觀組織、生成物相以及室溫和高溫阻尼性能進行了分析與表征。結果表明，制備溫度對復合材料的微觀組織和生成物相有較大的影響；隨著制備溫度的升高，原始顆粒之間的原位反應程度逐漸趨于完全，(B4C+Ti)/AZ91D復合材料的微觀組織逐漸由顆粒增強結構轉變?yōu)榫W(wǎng)絡互穿結構。(B4C+Ti)/Mg和(B4C+Ti)/AZ91D復合材料的室溫和高溫阻尼性能分別隨著應變振幅和溫度的升高而增強，主要作用機制為位錯阻尼和界面阻尼機制。

In situ reactive infiltration is a relatively new processing method to prepare metal matrix composites, which combines the advantages of in situ reaction synthesis and pressureless infiltration, and it has received increasing attention because of its cost-effectiveness, simplicity and high-efficiency, and near-net shaping capability. And by tailoring the relative density of preform, magnesium matrix composites with a high volume fraction of ceramic reinforcement can be obtained. In view of the poor wettability of B4C/Ti system leading to low efficiency of composite, Ti particulates with high melting point and immiscible with magnesium was added. And (B4C+Ti)/Mg and (B4C+Ti)/AZ91D composites have been prepared successfully by in situ reactive infiltration method with high efficiency and low cost. Microstructure, phase composition and damping capacities of the as-fabricated composites were characterized and analyzed. Results showed that with increasing the preparation temperatures, the reaction between the starting materials is more complete, and the microstructure of (B4C+Ti)/AZ91D composites tends to be interpenetrating networks from particle reinforced structure. The strain-dependent and temperature-dependent damping capacities of (B4C+Ti)/Mg and (B4C+Ti)/AZ91D composites improve gradually with the increase of strain amplitude and temperature respectively, and the dominant damping mechanisms are dislocation damping and interface damping.

全文下載：https://pan.baidu.com/s/1xvwylQj_oGbeUTOzr686Gg?

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優(yōu)秀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 superior 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086-021-3113 6111或發(fā)電子郵件service@txco.ltd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 086-021-3113 6111 or email us at service@txco.ltd. You can also get in touch on social media, we are constantly active on Weixin, Weibo, LinkedIn, Facebook, Twitter and Google+.