NiAl-Al2O3-TiC acted as transferring stress and supporting for protective layer. With increase of test temperature, decrease in strength and hardness of NiAl-Al2O3-TiC led to abscission and cracking of protective layer.

NiAl-Al2O3-TiC對(duì)保護(hù)層起到傳遞應(yīng)力和支撐作用黄色网站免费看a片，隨著試驗(yàn)溫度的升高欧美精品电影一区，NiAl-Al2O3-TiC強(qiáng)度和硬度的降低導(dǎo)致保護(hù)層的開裂和脫落影音先锋新男人av资源站。

For the composites with a low content of TiC particle, the rupture manner was mainly the nucleation of cavity and following ductility splitting fracture. But for the composites with a high content of TiC particle, the cracking and decohesion of TiC particles were the main rupture mechanism. For the composite containing a middle TiC content, the rupture mechanism consisted of the above two styles, but the former was the dominating mechanism and the later was the subordinate mechanism.

對(duì)TiC體積分?jǐn)?shù)較低的鋼基復(fù)合材料一个人看的视频www日本动漫，拉伸過程中TiC顆粒界面上的孔洞形核及隨后塑性撕開機(jī)制是其斷裂失效的主要機(jī)制14露出粉嫩小奶头网站；對(duì)TiC體積分?jǐn)?shù)較高的鋼基復(fù)合材料三级片免费一区，拉伸過程中TiC顆粒的開裂及脫落是其斷裂失效的主要機(jī)制：對(duì)TiC體積分?jǐn)?shù)介于上述兩者之間的鋼基復(fù)合材料，拉伸過程中TiC顆粒界面上的孔洞形核及隨后塑性撕開機(jī)制在其斷裂失效過程中占主要地位玖玖视频玖玖在线播放，而TiC顆粒的開裂及脫落占次要地位韩国三级2022最新中字幕在线观看。

Little overdose aluminum caused that the displacement reaction occurred between Al and TiO2 with releasing much heat, and Al2O3 and free Ti were formed, then the active Ti combined with C and produced TiC; more overdose aluminum caused the thermit reaction happened between Al and TiO2, and was generated, then Al3 Ti combined with C and produced TiC.

首先在無過量鋁的情況下，Al與TiO2發(fā)生置換反應(yīng)国产一级婬片A片AAA毛片鲁鲁，生成了Ai2O3和游離態(tài)99热在线精品播放，而后游離態(tài)與C結(jié)合生成TiC；而存在過量鋁的情況下18成年大片免费网站，首先發(fā)生鋁熱反應(yīng)生成Al3Ti国内自拍区在线下载网站视频播放器，進(jìn)而Al3Ti與C結(jié)合生成TiC。最終完全獲得Ai2O3-TiC/Al復(fù)合材料久久不射黄色网站。

The analyzed results about the forming mechanism of TiC indicate that the dendritical TiC is the primary TiC which freely grows in a continuous growth way in supercooling liquid metal before the peritectic reaction, and the short bar-like TiC nucleates and grows in β—Ti after peritectic reaction.

在對(duì)TiC形成機(jī)制的分析中認(rèn)為春雨直播视频在线观看免费高清，樹枝狀TiC是包晶反應(yīng)之前過冷熔體中，以連續(xù)生長方式自由生長而成的初生TiC日日摸日日碰夜夜爽97无码，而短棒狀TiC則是包晶反應(yīng)后在β-Ti的內(nèi)部生核并長大而成天天色天天吹天天操天天日天天爽。

Nano particle after being dispersed fully is added into A1, TiO2 and C powder in the suspension, and through fully mixing and combusting composition, loose blank of nano composite Al2O3-TiC base ceramic is obtained; and the blank is crushed, ball milled and hot pressed to densify, nano composite Al2O3-TiC base ceramic is obtained, which ontains Al2O3 40-55 wt%, TiC 25-48 wt%, nano phase 0.1-25 wt% and sintering assistant 0-2 wt%.

以重量百分比計(jì)，將納米粒子充分分散后久草A片在线视频，以懸浮液的形式加入Al中文字幕36页、TiO2、C粉末中第一福利视频精品，經(jīng)充分混合后進(jìn)行燃燒合成，得到Al2O3－TiC基納米復(fù)合陶瓷的疏松坯體国产av无码影音先锋；將燃燒合成所得的坯體破碎强奸熟女的视频、球磨后，進(jìn)行熱壓致密化處理ACG邪恶全彩邪恶帝绅士库韩国，制得含有三氧化二鋁40.0－55.0％国内精品1024地址一地址二，碳化鈦25.0－48.0％，納米相0.1－25.0％精品视频国产狼友视频下载，燒結(jié)助劑0－2.0％的Al2O3－TiC基納米復(fù)合陶瓷材料一级片免费播放。

After quenching, the phases of the composite are as same as the as-cast composite, but the morphography of TiC particulate was transformed from square to sphere, some TiC particulates coarsen due to the precipitation of the solid-soluble TiC particulates; the other TiC particulates change into the smaller spherical particulates due to the solution of the sharpangled portion of the quadrate TiC particulates.

熱處理后人人草人人爱人人色，復(fù)合材料的相組成不變，但是TiC顆粒由方形變成球形免费A级毛片无码免费视频120，固溶析出的TiC顆粒在某些TiC顆粒的表面沉積200av天堂，使后者粗化；另一些方形顆粒的尖角處溶解形成直徑更小的球形TiC顆粒欧美精品三级在线看一区。

The uniphase C with W/≤0.3 can be synthesized without being preheated. When W/ is higher than 0.3, the sample expansion increases with the increase of W content, the reaction between W and C is incomplete, the combustion products consist of W〓C, WC, TiC, C, and unreacted W. Preheating mixtures can accelerate the completion of the reaction among Ti, W, and C. The uniphase C with W/=0.4 can be synthesized by SHS at preheat temperature of 600℃. There are two kinds of powders with size of 2-4μm and size less than 1μm in the combustion products.

通過燃燒前沿激冷淬熄試驗(yàn)及產(chǎn)物形貌特征（燃燒塊斷面組織和產(chǎn)物多晶聚合體顆粒）分析成人日韩欧美在线电影，創(chuàng)新性地提出了兩種體系的自蔓延高溫反應(yīng)機(jī)制。1熔化—溶解—析出機(jī)制：當(dāng)燃燒溫度較高時(shí)国产性爱香焦视频，燃燒前沿Ti粉熔化日本乱子伦视频，W和C溶解于熔融Ti里，而后C從熔融里析出久久性爱视频网。2擴(kuò)散—固溶機(jī)制：當(dāng)燃燒溫度不足以使燃燒前沿Ti粉熔化時(shí)国产yyzz，通過C的擴(kuò)散先形成TiC層，其后C沿著熱應(yīng)力導(dǎo)致的TiC層裂紋繼續(xù)擴(kuò)散日韩欧美中文在线，與固態(tài)Ti核反應(yīng)生成TiC无码在线观看视频；同時(shí)，C擴(kuò)散至W顆粒午夜看了可以高潮的免费视频，形成W〓C欧美一级aa大片高清在线，而后通過C的繼續(xù)擴(kuò)散W〓C轉(zhuǎn)變成WC；與此同時(shí)一级性生活A片，WC固溶至TiC里91黄色影院，形成C固溶體。

These five zones are as follows: the zone of the reaction synthesis of TiC, the zone of reaction completion, the zone of the growth and homogenization of TiC, the zone of ideal structure and the zone of coarsened TiC particulates.

結(jié)果表明：適當(dāng)提高合金熔體的等溫反應(yīng)溫度并選擇理想的反應(yīng)時(shí)間自偷自拍亚洲综合精品图片，可獲得尺寸細(xì)小国产伦精品一区二区三区视频播放、數(shù)目較多且分布均勻的原位TiC顆粒；當(dāng)合金熔體中TiC的合成反應(yīng)基本完成時(shí)jizzjizz11，凝固速度對(duì)組織中TiC顆粒的數(shù)量和尺寸的影響不是很大无尽xxxxx。

The results show: TiC particulates can act as nucleates of α-Al and enter into α-Al during solidification. They also can act as nucleates of S' phase during ageing, there are a lot dislocations around TiC particalates, which accelerate ageing process of 2024/TiC composites.

研究表明：TiC顆粒能作為α—Al形核核心，在凝固過程中進(jìn)入α—Al基體午夜视频!操逼!；在時(shí)效過程中国产亚洲福利国产亚洲，TiC顆粒可以作為S′相的襯底国产又爽又黄又湿的视频，其周圍存在大量位錯(cuò)欧美爱爱视频免费，加快了復(fù)合材料的時(shí)效進(jìn)程。

The results show that the composite compound observed is mainly composed of TiC, CaS and CeS; the nucleation sequence of the phases during the solidification of the alloy is CeS→TiC→austenite; the (100) crystal plane of CeS and the (001) plane of TiC, and (100) plane of TiC and (001) plane of austenite match perfectly; CeS can act as the heterogeneous nucleating center of TiC, and TiC can act as the nucleating center of austenite.

結(jié)果表明：試樣中的復(fù)合化合物主要由CaS，CeS和TiC組成99超碰在线公开视；合金凝固時(shí)的形核順序?yàn)镃eS→TiC→奧氏體日韩性交网站；CeS及CaS的(100)晶面與TiC的(001)晶面、TiC的(100)晶面與奧氏體的(001)晶面匹配良好欧洲老妇人与异性性交；CeS凝固時(shí)可作為TiC的異質(zhì)形核核心黄色视频240版，而TiC又可作為奧氏體的形核核心。