$and fracturetoughnessoftheWC–40vol%Al2O3–MgOcomposites.From Fig. 1a it translation - and fracturetoughnessoftheWC–40vol%Al2O3–MgOcomposites.From Fig. 1a it Thai how to say$

and fracturetoughnessoftheWC–40vol%

and fracturetoughnessoftheWC–40vol%Al2O3–MgO
composites.From Fig. 1a itcanbeseenthatsmallamount
of MgOwasbeneficialtotheimprovementofrelative
densities ofWC–40vol%Al2O3–MgOcomposites.The
relative densityincreasedinitiallytothemaximumvalue
when theMgOcontentreachedto0.1wt%,thenit
decreasedwiththeincreasingMgOcontent.Thegrainsize
of WCinitiallydecreasedfrom3.92 mm to2.3 mm whenthe
MgO contentincreasedfrom0to0.1wt%,thenincreased
correspondinglywiththeincreasingcontentofMgO.
From Fig. 1b, itcouldbeobservedthattheVickers
hardness andfracturetoughnessofWC–40vol%Al2O3–
MgO compositesweresignificantlyimprovedwiththe
addition ofMgO.WhentheMgOcontentwas0.1wt%,
both theVickershardnessandfracturetoughnessreached
to themaximumvaluesof17.6GPaand9.59MPam1/2,
respectively.WiththeincreasingcontentofMgO,the
Vickers hardnessandfracturetoughnesswerestillhigher
than thatofundopedWC–40vol%Al2O3 composites,
however,followingadecreasingtrend.Itwasindicated
that theoptimumMgOcontentwas0.1wt%;anexcessive
addition ofMgO(0.25wt%–0.1wt%)resultedinthe
decreasingrelativedensity,increasingWCgrainsizeand
decreasingmechanicalproperties.
Accordingtotheaboveresults,itcouldbeindicated
that, MgO,asasinteringadditive,hadakeyrolein
improvingthedensificationandmechanicalpropertiesof
the WC–40vol%Al2O3 composites.MgOadditionacted
to increasetherateofdensificationdirectlythrougha
raising diffusioncoefficientanddecreasetherateofgrain
growth duringsinteringthroughaloweringsurfacediffu-
sion coefficient.Meanwhile,MgOadditioncouldalso
lower thegrianboundarymobility [12]. Thesewerethe
main reasonsforthehighrelativedensity,refinedWC
grainsizeandenhancedmechanicalpropertiesoftheWC–40
vol%Al2O3 compositesdopedwith0.1wt%MgO.However,

0/5000

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Results (Thai) 1: [Copy]

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fracturetoughnessoftheWC–40vol % Al2O3–MgO
คอมโพสิตจาก Fig. 1a itcanbeseenthatsmallamount
ของ MgOwasbeneficialtotheimprovementofrelative
densityincreasedinitiallytothemaximumvalue ofWC–40vol%Al2O3–MgOcomposites.The
relative แน่น
เมื่อ theMgOcontentreachedto0.1wt%,thenit
decreasedwiththeincreasingMgOcontent.Thegrainsize
of WCinitiallydecreasedfrom3.92 มม. to2.3 มม. whenthe
MgO contentincreasedfrom0to0.1wt%,thenincreased
correspondinglywiththeincreasingcontentofMgO.
From Fig. 1b, itcouldbeobservedthattheVickers
ความแข็ง andfracturetoughnessofWC–40vol % Al2O3–
MgO compositesweresignificantlyimprovedwiththe
เพิ่ม ofMgO.WhentheMgOcontentwas0.1wt%,
both theVickershardnessandfracturetoughnessreached
เพื่อ themaximumvaluesof17.6GPaand9.59MPam1/2,
respectivelyWiththeincreasingcontentofMgO การ
วิกเกอร์ส hardnessandfracturetoughnesswerestillhigher
กว่า thatofundopedWC–40vol % Al2O3 คอมโพสิต,
อย่างไรก็ตาม followingadecreasingtrendItwasindicated
resultedinthe ofMgO (0.25wt%–0.1wt%) ที่ theoptimumMgOcontentwas0.1wt%;anexcessive
addition
decreasingrelativedensity, increasingWCgrainsizeand
decreasingmechanicalproperties.
Accordingtotheaboveresultsitcouldbeindicated
ที่ MgO, asasinteringadditive, hadakeyrolein
improvingthedensificationandmechanicalpropertiesof
คอมโพสิต% Al2O3 WC–40volMgOadditionacted
เพื่อ increasetherateofdensificationdirectlythrougha
ยก diffusioncoefficientanddecreasetherateofgrain
duringsinteringthroughaloweringsurfacediffu เจริญเติบโต-
sion สัมประสิทธิ์การในขณะเดียวกัน MgOadditioncouldalso
ล่าง thegrianboundarymobility [12] Thesewerethe
reasonsforthehighrelativedensity หลัก refinedWC
grainsizeandenhancedmechanicalpropertiesoftheWC–40
vol % Al2O3 compositesdopedwith0.1wt%MgO.However

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Results (Thai) 2:[Copy]

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และ fracturetoughnessoftheWC-40vol% Al2O3-MgO
composites.From รูป itcanbeseenthatsmallamount 1a
ของ MgOwasbeneficialtotheimprovementofrelative
ความหนาแน่น ofWC-40vol% Al2O3-MgOcomposites.The
densityincreasedinitiallytothemaximumvalue ญาติ
เมื่อ theMgOcontentreachedto0.1wt% thenit
decreasedwiththeincreasingMgOcontent.Thegrainsize
ของ WCinitiallydecreasedfrom3.92 มม. to2.3 มม. whenthe
MgO contentincreasedfrom0to0.1wt% thenincreased
correspondinglywiththeincreasingcontentofMgO
จากรูปที่ 1b, itcouldbeobservedthattheVickers
แข็ง andfracturetoughnessofWC-40vol% Al2O3-
MgO compositesweresignificantlyimprovedwiththe
นอกจาก ofMgO.WhentheMgOcontentwas0.1wt%
ทั้ง theVickershardnessandfracturetoughnessreached
จะ themaximumvaluesof17.6GPaand9.59MPam1 / 2,
respectively.WiththeincreasingcontentofMgO,
hardnessandfracturetoughnesswerestillhigher วิคเกอร์
กว่า thatofundopedWC-40vol% ผสม Al2O3,
แต่ followingadecreasingtrend Itwasindicated
ที่ theoptimumMgOcontentwas0.1wt%; anexcessive
นอกจากนี้ MgO, asasinteringadditive, hadakeyrolein improvingthedensificationandmechanicalpropertiesof WC-40vol% Al2O3 composites.MgOadditionacted จะ increasetherateofdensificationdirectlythrougha diffusioncoefficientanddecreasetherateofgrain เพิ่มการเจริญเติบโต duringsinteringthroughaloweringsurfacediffu- coefficient.Meanwhile ไซออน, MgOadditioncouldalso thegrianboundarymobility ลดลง [12] Thesewerethe หลัก compositesdopedwith0.1wt% MgO.However,

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Results (Thai) 3:[Copy]

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และ fracturetoughnessofthewc – 40vol % Al2O3 ) MgO
composites.from รูปที่ 1A itcanbeseenthatsmallamount

มีความหนาแน่นของ mgowasbeneficialtotheimprovementofrelative ofwc – 40vol % Al2O3 – mgocomposites .

เมื่อเทียบ densityincreasedinitiallytothemaximumvalue themgocontentreachedto0.1wt % , thenit
decreasedwiththeincreasingmgocontent . thegrainsize
ของ wcinitiallydecreasedfrom3.92 มม. to2.3 มม. เมื่อ
contentincreasedfrom0to0.1wt % MgO , correspondinglywiththeincreasingcontentofmgo thenincreased
.
จากรูป 1B , itcouldbeobservedthatthevickers
ความแข็ง andfracturetoughnessofwc – 40vol % Al2O3 ) MgO และ compositesweresignificantlyimprovedwiththe

ofmgo . whenthemgocontentwas0.1wt %

ไปทั้ง thevickershardnessandfracturetoughnessreached themaximumvaluesof17.6gpaand9.59mpam1 / 2
ตามลำดับwiththeincreasingcontentofmgo ,

กว่า thatofundopedwc วิคเกอร์ hardnessandfracturetoughnesswerestillhigher – 40vol % อะลูมิเนียมคอมโพสิต
แต่ followingadecreasingtrend . itwasindicated
ที่ theoptimummgocontentwas0.1wt % ; anexcessive
2 ofmgo ( 0.25wt % – 0.1wt % ) resultedinthe
decreasingrelativedensity increasingwcgrainsizeand decreasingmechanicalproperties accordingtotheaboveresults
, .
,itcouldbeindicated
, MgO , asasinteringadditive hadakeyrolein

, improvingthedensificationandmechanicalpropertiesof สุขา– 40vol % อะลูมิเนียมคอมโพสิต mgoadditionacted

เลี้ยงเพื่อ increasetherateofdensificationdirectlythrougha diffusioncoefficientanddecreasetherateofgrain
-
เจริญ duringsinteringthroughaloweringsurfacediffu ไซออนสัมประสิทธิ์ ในขณะเดียวกัน mgoadditioncouldalso
ลด thegrianboundarymobility [ 12 ] thesewerethe
หลัก reasonsforthehighrelativedensity refinedwc

, grainsizeandenhancedmechanicalpropertiesofthewc – 40 % mgo.however Al2O3 compositesdopedwith0.1wt Vol % ,

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